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feature/android 6f2a518f272: Update from gnulib


From: Po Lu
Subject: feature/android 6f2a518f272: Update from gnulib
Date: Sat, 28 Jan 2023 01:48:38 -0500 (EST)

branch: feature/android
commit 6f2a518f2728bdad24161c04476c5f95c60b6f55
Author: Po Lu <luangruo@yahoo.com>
Commit: Po Lu <luangruo@yahoo.com>

    Update from gnulib
    
    * cross/lib/stdalign.in.h (_GL_STDALIGN_H):
    (_):
    (__alignof_is_defined):
    * cross/lib/vasnprintf.c:
    * lib/gnulib.mk.in (ANDROID_MIN_SDK):
    (HAVE_SPAWN_H):
    (LIBGCCJIT_LIBS):
    (NATIVE_COMPILATION_AOT):
    (NEXT_AS_FIRST_DIRECTIVE_LIMITS_H):
    (NEXT_LIMITS_H):
    (SIZEOF_LONG):
    (stdalign.h):
    * ../../../../dev/null:
    * lib/stdalign.in.h (_GL_STDALIGN_H):
    (_):
    (__alignof_is_defined):
    * lib/vasnprintf.c:
    * m4/gnulib-common.m4 (gl_COMMON_BODY):
    * m4/stdalign.m4 (gl_ALIGNASOF):
    * m4/stddef_h.m4: Update from gnulib.
---
 cross/lib/stdalign.in.h |   21 +-
 cross/lib/vasnprintf.c  |    2 +-
 lib/gnulib.mk.in        |   18 +-
 lib/math.h              | 3242 -----------------------------------------------
 lib/stdalign.in.h       |   21 +-
 lib/vasnprintf.c        |    1 +
 m4/gnulib-common.m4     |  310 +++--
 m4/stdalign.m4          |   65 +-
 m4/stddef_h.m4          |   11 +-
 9 files changed, 286 insertions(+), 3405 deletions(-)

diff --git a/cross/lib/stdalign.in.h b/cross/lib/stdalign.in.h
index 6523546f16d..b616c100fdc 100644
--- a/cross/lib/stdalign.in.h
+++ b/cross/lib/stdalign.in.h
@@ -20,8 +20,22 @@
 /* Define two obsolescent C11 macros, assuming alignas and alignof are
    either keywords or alignasof-defined macros.  */
 
-#ifndef _GL_STDALIGN_H
-#define _GL_STDALIGN_H
+#ifndef _@GUARD_PREFIX@_STDALIGN_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* We need to include the system's <stdalign.h> when it exists, because it 
might
+   define 'alignof' as a macro when it's not a keyword or compiler built-in.  
*/
+#if @HAVE_STDALIGN_H@
+/* The include_next requires a split double-inclusion guard.  */
+# @INCLUDE_NEXT@ @NEXT_STDALIGN_H@
+#endif
+
+#ifndef _@GUARD_PREFIX@_STDALIGN_H
+#define _@GUARD_PREFIX@_STDALIGN_H
 
 #if (defined alignas \
      || (defined __STDC_VERSION__ && 202311 <= __STDC_VERSION__) \
@@ -31,4 +45,5 @@
 
 #define __alignof_is_defined 1
 
-#endif /* _GL_STDALIGN_H */
+#endif /* _@GUARD_PREFIX@_STDALIGN_H */
+#endif /* _@GUARD_PREFIX@_STDALIGN_H */
diff --git a/cross/lib/vasnprintf.c b/cross/lib/vasnprintf.c
index f237619e889..277c39e3e07 100644
--- a/cross/lib/vasnprintf.c
+++ b/cross/lib/vasnprintf.c
@@ -83,10 +83,10 @@
 #include <stdio.h>      /* snprintf(), sprintf() */
 #include <stdlib.h>     /* abort(), malloc(), realloc(), free() */
 #include <string.h>     /* memcpy(), strlen() */
+#include <wchar.h>      /* mbstate_t, mbrtowc(), mbrlen(), wcrtomb() */
 #include <errno.h>      /* errno */
 #include <limits.h>     /* CHAR_BIT */
 #include <float.h>      /* DBL_MAX_EXP, LDBL_MAX_EXP */
-#include <wchar.h>
 #if HAVE_NL_LANGINFO
 # include <langinfo.h>
 #endif
diff --git a/lib/gnulib.mk.in b/lib/gnulib.mk.in
index 60471323d30..c27fa841863 100644
--- a/lib/gnulib.mk.in
+++ b/lib/gnulib.mk.in
@@ -191,6 +191,7 @@ ANDROID_LIBS = @ANDROID_LIBS@
 ANDROID_MIN_SDK = @ANDROID_MIN_SDK@
 ANDROID_OBJ = @ANDROID_OBJ@
 ANDROID_SDK_18_OR_EARLIER = @ANDROID_SDK_18_OR_EARLIER@
+APKSIGNER = @APKSIGNER@
 APPLE_UNIVERSAL_BUILD = @APPLE_UNIVERSAL_BUILD@
 AR = @AR@
 ARFLAGS = @ARFLAGS@
@@ -1048,6 +1049,7 @@ HAVE_SLEEP = @HAVE_SLEEP@
 HAVE_SPAWN_H = @HAVE_SPAWN_H@
 HAVE_SQRTF = @HAVE_SQRTF@
 HAVE_SQRTL = @HAVE_SQRTL@
+HAVE_STDALIGN_H = @HAVE_STDALIGN_H@
 HAVE_STDINT_H = @HAVE_STDINT_H@
 HAVE_STPCPY = @HAVE_STPCPY@
 HAVE_STPNCPY = @HAVE_STPNCPY@
@@ -1132,6 +1134,7 @@ LIBGCCJIT_CFLAGS = @LIBGCCJIT_CFLAGS@
 LIBGCCJIT_LIBS = @LIBGCCJIT_LIBS@
 LIBGIF = @LIBGIF@
 LIBGMP = @LIBGMP@
+LIBGMP_CFLAGS = @LIBGMP_CFLAGS@
 LIBGNUTLS_CFLAGS = @LIBGNUTLS_CFLAGS@
 LIBGNUTLS_LIBS = @LIBGNUTLS_LIBS@
 LIBGNU_LIBDEPS = @LIBGNU_LIBDEPS@
@@ -1198,10 +1201,13 @@ NANOSLEEP_LIB = @NANOSLEEP_LIB@
 NATIVE_COMPILATION_AOT = @NATIVE_COMPILATION_AOT@
 NDK_BUILD_ABI = @NDK_BUILD_ABI@
 NDK_BUILD_ANDROID_MK = @NDK_BUILD_ANDROID_MK@
+NDK_BUILD_ANY_CXX_MODULE = @NDK_BUILD_ANY_CXX_MODULE@
 NDK_BUILD_AR = @NDK_BUILD_AR@
 NDK_BUILD_ARCH = @NDK_BUILD_ARCH@
 NDK_BUILD_CC = @NDK_BUILD_CC@
+NDK_BUILD_CXX_SHARED = @NDK_BUILD_CXX_SHARED@
 NDK_BUILD_MODULES = @NDK_BUILD_MODULES@
+NDK_BUILD_NASM = @NDK_BUILD_NASM@
 NDK_BUILD_SDK = @NDK_BUILD_SDK@
 NEXT_ASSERT_H = @NEXT_ASSERT_H@
 NEXT_AS_FIRST_DIRECTIVE_ASSERT_H = @NEXT_AS_FIRST_DIRECTIVE_ASSERT_H@
@@ -1214,6 +1220,7 @@ NEXT_AS_FIRST_DIRECTIVE_INTTYPES_H = 
@NEXT_AS_FIRST_DIRECTIVE_INTTYPES_H@
 NEXT_AS_FIRST_DIRECTIVE_LIMITS_H = @NEXT_AS_FIRST_DIRECTIVE_LIMITS_H@
 NEXT_AS_FIRST_DIRECTIVE_MATH_H = @NEXT_AS_FIRST_DIRECTIVE_MATH_H@
 NEXT_AS_FIRST_DIRECTIVE_SIGNAL_H = @NEXT_AS_FIRST_DIRECTIVE_SIGNAL_H@
+NEXT_AS_FIRST_DIRECTIVE_STDALIGN_H = @NEXT_AS_FIRST_DIRECTIVE_STDALIGN_H@
 NEXT_AS_FIRST_DIRECTIVE_STDDEF_H = @NEXT_AS_FIRST_DIRECTIVE_STDDEF_H@
 NEXT_AS_FIRST_DIRECTIVE_STDINT_H = @NEXT_AS_FIRST_DIRECTIVE_STDINT_H@
 NEXT_AS_FIRST_DIRECTIVE_STDIO_H = @NEXT_AS_FIRST_DIRECTIVE_STDIO_H@
@@ -1235,6 +1242,7 @@ NEXT_INTTYPES_H = @NEXT_INTTYPES_H@
 NEXT_LIMITS_H = @NEXT_LIMITS_H@
 NEXT_MATH_H = @NEXT_MATH_H@
 NEXT_SIGNAL_H = @NEXT_SIGNAL_H@
+NEXT_STDALIGN_H = @NEXT_STDALIGN_H@
 NEXT_STDDEF_H = @NEXT_STDDEF_H@
 NEXT_STDINT_H = @NEXT_STDINT_H@
 NEXT_STDIO_H = @NEXT_STDIO_H@
@@ -1560,6 +1568,7 @@ SIG_ATOMIC_T_SUFFIX = @SIG_ATOMIC_T_SUFFIX@
 SIZEOF_LONG = @SIZEOF_LONG@
 SIZE_T_SUFFIX = @SIZE_T_SUFFIX@
 SMALL_JA_DIC = @SMALL_JA_DIC@
+SQLITE3_CFLAGS = @SQLITE3_CFLAGS@
 SQLITE3_LIBS = @SQLITE3_LIBS@
 STDALIGN_H = @STDALIGN_H@
 STDCKDINT_H = @STDCKDINT_H@
@@ -3767,7 +3776,14 @@ BUILT_SOURCES += $(STDALIGN_H)
 # doesn't have one that works.
 ifneq (,$(GL_GENERATE_STDALIGN_H_CONDITION))
 stdalign.h: stdalign.in.h $(top_builddir)/config.status
-       $(gl_V_at)$(SED_HEADER_TO_AT_t) $(srcdir)/stdalign.in.h
+       $(gl_V_at)$(SED_HEADER_STDOUT) \
+             -e 's|@''GUARD_PREFIX''@|GL|g' \
+             -e 's|@''HAVE_STDALIGN_H''@|$(HAVE_STDALIGN_H)|g' \
+             -e 's|@''INCLUDE_NEXT''@|$(INCLUDE_NEXT)|g' \
+             -e 's|@''PRAGMA_SYSTEM_HEADER''@|@PRAGMA_SYSTEM_HEADER@|g' \
+             -e 's|@''PRAGMA_COLUMNS''@|@PRAGMA_COLUMNS@|g' \
+             -e 's|@''NEXT_STDALIGN_H''@|$(NEXT_STDALIGN_H)|g' \
+             $(srcdir)/stdalign.in.h > $@-t
        $(AM_V_at)mv $@-t $@
 else
 stdalign.h: $(top_builddir)/config.status
diff --git a/lib/math.h b/lib/math.h
deleted file mode 100644
index 75fed49531d..00000000000
--- a/lib/math.h
+++ /dev/null
@@ -1,3242 +0,0 @@
-/* DO NOT EDIT! GENERATED AUTOMATICALLY! */
-/* A GNU-like <math.h>.
-
-   Copyright (C) 2002-2003, 2007-2023 Free Software Foundation, Inc.
-
-   This file is free software: you can redistribute it and/or modify
-   it under the terms of the GNU Lesser General Public License as
-   published by the Free Software Foundation; either version 2.1 of the
-   License, or (at your option) any later version.
-
-   This file is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
-   GNU Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public License
-   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
-
-/* On Android, in C++ mode, when /usr/include/c++/v1/math.h is being included
-   and /usr/include/math.h has not yet been included, skip this file, since it
-   would lead to many syntax errors.  */
-#if !(defined __ANDROID__ && defined _LIBCPP_MATH_H && !defined INFINITY)
-
-#ifndef _GL_MATH_H
-
-#if __GNUC__ >= 3
-#pragma GCC system_header
-#endif
-
-
-#if defined _GL_INCLUDING_MATH_H
-/* Special invocation convention:
-   - On FreeBSD 12.2 we have a sequence of nested includes
-     <math.h> -> <stdlib.h> -> <sys/wait.h> -> <sys/types.h> -> <sys/select.h>
-       -> <signal.h> -> <pthread.h> -> <stdlib.h> -> <math.h>
-     In this situation, the functions are not yet declared, therefore we cannot
-     provide the C++ aliases.  */
-
-#include_next <math.h>
-
-#else
-/* Normal invocation convention.  */
-
-/* The include_next requires a split double-inclusion guard.  */
-#define _GL_INCLUDING_MATH_H
-#include_next <math.h>
-#undef _GL_INCLUDING_MATH_H
-
-#ifndef _GL_MATH_H
-#define _GL_MATH_H
-
-/* On OpenVMS, NAN, INFINITY, and HUGEVAL macros are defined in <fp.h>.  */
-#if defined __VMS && ! defined NAN
-# include <fp.h>
-#endif
-
-#ifndef _GL_INLINE_HEADER_BEGIN
- #error "Please include config.h first."
-#endif
-_GL_INLINE_HEADER_BEGIN
-#ifndef _GL_MATH_INLINE
-# define _GL_MATH_INLINE _GL_INLINE
-#endif
-
-/* The __attribute__ feature is available in gcc versions 2.5 and later.
-   The attribute __const__ was added in gcc 2.95.  */
-#ifndef _GL_ATTRIBUTE_CONST
-# if __GNUC__ > 2 || (__GNUC__ == 2 && __GNUC_MINOR__ >= 95) || defined 
__clang__
-#  define _GL_ATTRIBUTE_CONST __attribute__ ((__const__))
-# else
-#  define _GL_ATTRIBUTE_CONST /* empty */
-# endif
-#endif
-
-/* The definitions of _GL_FUNCDECL_RPL etc. are copied here.  */
-/* C++ compatible function declaration macros.
-   Copyright (C) 2010-2023 Free Software Foundation, Inc.
-
-   This program is free software: you can redistribute it and/or modify it
-   under the terms of the GNU Lesser General Public License as published
-   by the Free Software Foundation; either version 2 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public License
-   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
-
-#ifndef _GL_CXXDEFS_H
-#define _GL_CXXDEFS_H
-
-/* Begin/end the GNULIB_NAMESPACE namespace.  */
-#if defined __cplusplus && defined GNULIB_NAMESPACE
-# define _GL_BEGIN_NAMESPACE namespace GNULIB_NAMESPACE {
-# define _GL_END_NAMESPACE }
-#else
-# define _GL_BEGIN_NAMESPACE
-# define _GL_END_NAMESPACE
-#endif
-
-/* The three most frequent use cases of these macros are:
-
-   * For providing a substitute for a function that is missing on some
-     platforms, but is declared and works fine on the platforms on which
-     it exists:
-
-       #if @GNULIB_FOO@
-       # if !@HAVE_FOO@
-       _GL_FUNCDECL_SYS (foo, ...);
-       # endif
-       _GL_CXXALIAS_SYS (foo, ...);
-       _GL_CXXALIASWARN (foo);
-       #elif defined GNULIB_POSIXCHECK
-       ...
-       #endif
-
-   * For providing a replacement for a function that exists on all platforms,
-     but is broken/insufficient and needs to be replaced on some platforms:
-
-       #if @GNULIB_FOO@
-       # if @REPLACE_FOO@
-       #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-       #   undef foo
-       #   define foo rpl_foo
-       #  endif
-       _GL_FUNCDECL_RPL (foo, ...);
-       _GL_CXXALIAS_RPL (foo, ...);
-       # else
-       _GL_CXXALIAS_SYS (foo, ...);
-       # endif
-       _GL_CXXALIASWARN (foo);
-       #elif defined GNULIB_POSIXCHECK
-       ...
-       #endif
-
-   * For providing a replacement for a function that exists on some platforms
-     but is broken/insufficient and needs to be replaced on some of them and
-     is additionally either missing or undeclared on some other platforms:
-
-       #if @GNULIB_FOO@
-       # if @REPLACE_FOO@
-       #  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-       #   undef foo
-       #   define foo rpl_foo
-       #  endif
-       _GL_FUNCDECL_RPL (foo, ...);
-       _GL_CXXALIAS_RPL (foo, ...);
-       # else
-       #  if !@HAVE_FOO@   or   if !@HAVE_DECL_FOO@
-       _GL_FUNCDECL_SYS (foo, ...);
-       #  endif
-       _GL_CXXALIAS_SYS (foo, ...);
-       # endif
-       _GL_CXXALIASWARN (foo);
-       #elif defined GNULIB_POSIXCHECK
-       ...
-       #endif
-*/
-
-/* _GL_EXTERN_C declaration;
-   performs the declaration with C linkage.  */
-#if defined __cplusplus
-# define _GL_EXTERN_C extern "C"
-#else
-# define _GL_EXTERN_C extern
-#endif
-
-/* _GL_FUNCDECL_RPL (func, rettype, parameters_and_attributes);
-   declares a replacement function, named rpl_func, with the given prototype,
-   consisting of return type, parameters, and attributes.
-   Example:
-     _GL_FUNCDECL_RPL (open, int, (const char *filename, int flags, ...)
-                                  _GL_ARG_NONNULL ((1)));
- */
-#define _GL_FUNCDECL_RPL(func,rettype,parameters_and_attributes) \
-  _GL_FUNCDECL_RPL_1 (rpl_##func, rettype, parameters_and_attributes)
-#define _GL_FUNCDECL_RPL_1(rpl_func,rettype,parameters_and_attributes) \
-  _GL_EXTERN_C rettype rpl_func parameters_and_attributes
-
-/* _GL_FUNCDECL_SYS (func, rettype, parameters_and_attributes);
-   declares the system function, named func, with the given prototype,
-   consisting of return type, parameters, and attributes.
-   Example:
-     _GL_FUNCDECL_SYS (open, int, (const char *filename, int flags, ...)
-                                  _GL_ARG_NONNULL ((1)));
- */
-#define _GL_FUNCDECL_SYS(func,rettype,parameters_and_attributes) \
-  _GL_EXTERN_C rettype func parameters_and_attributes
-
-/* _GL_CXXALIAS_RPL (func, rettype, parameters);
-   declares a C++ alias called GNULIB_NAMESPACE::func
-   that redirects to rpl_func, if GNULIB_NAMESPACE is defined.
-   Example:
-     _GL_CXXALIAS_RPL (open, int, (const char *filename, int flags, ...));
-
-   Wrapping rpl_func in an object with an inline conversion operator
-   avoids a reference to rpl_func unless GNULIB_NAMESPACE::func is
-   actually used in the program.  */
-#define _GL_CXXALIAS_RPL(func,rettype,parameters) \
-  _GL_CXXALIAS_RPL_1 (func, rpl_##func, rettype, parameters)
-#if defined __cplusplus && defined GNULIB_NAMESPACE
-# define _GL_CXXALIAS_RPL_1(func,rpl_func,rettype,parameters) \
-    namespace GNULIB_NAMESPACE                                \
-    {                                                         \
-      static const struct _gl_ ## func ## _wrapper            \
-      {                                                       \
-        typedef rettype (*type) parameters;                   \
-                                                              \
-        inline operator type () const                         \
-        {                                                     \
-          return ::rpl_func;                                  \
-        }                                                     \
-      } func = {};                                            \
-    }                                                         \
-    _GL_EXTERN_C int _gl_cxxalias_dummy
-#else
-# define _GL_CXXALIAS_RPL_1(func,rpl_func,rettype,parameters) \
-    _GL_EXTERN_C int _gl_cxxalias_dummy
-#endif
-
-/* _GL_CXXALIAS_MDA (func, rettype, parameters);
-   is to be used when func is a Microsoft deprecated alias, on native Windows.
-   It declares a C++ alias called GNULIB_NAMESPACE::func
-   that redirects to _func, if GNULIB_NAMESPACE is defined.
-   Example:
-     _GL_CXXALIAS_MDA (open, int, (const char *filename, int flags, ...));
- */
-#define _GL_CXXALIAS_MDA(func,rettype,parameters) \
-  _GL_CXXALIAS_RPL_1 (func, _##func, rettype, parameters)
-
-/* _GL_CXXALIAS_RPL_CAST_1 (func, rpl_func, rettype, parameters);
-   is like  _GL_CXXALIAS_RPL_1 (func, rpl_func, rettype, parameters);
-   except that the C function rpl_func may have a slightly different
-   declaration.  A cast is used to silence the "invalid conversion" error
-   that would otherwise occur.  */
-#if defined __cplusplus && defined GNULIB_NAMESPACE
-# define _GL_CXXALIAS_RPL_CAST_1(func,rpl_func,rettype,parameters) \
-    namespace GNULIB_NAMESPACE                                     \
-    {                                                              \
-      static const struct _gl_ ## func ## _wrapper                 \
-      {                                                            \
-        typedef rettype (*type) parameters;                        \
-                                                                   \
-        inline operator type () const                              \
-        {                                                          \
-          return reinterpret_cast<type>(::rpl_func);               \
-        }                                                          \
-      } func = {};                                                 \
-    }                                                              \
-    _GL_EXTERN_C int _gl_cxxalias_dummy
-#else
-# define _GL_CXXALIAS_RPL_CAST_1(func,rpl_func,rettype,parameters) \
-    _GL_EXTERN_C int _gl_cxxalias_dummy
-#endif
-
-/* _GL_CXXALIAS_MDA_CAST (func, rettype, parameters);
-   is like  _GL_CXXALIAS_MDA (func, rettype, parameters);
-   except that the C function func may have a slightly different declaration.
-   A cast is used to silence the "invalid conversion" error that would
-   otherwise occur.  */
-#define _GL_CXXALIAS_MDA_CAST(func,rettype,parameters) \
-  _GL_CXXALIAS_RPL_CAST_1 (func, _##func, rettype, parameters)
-
-/* _GL_CXXALIAS_SYS (func, rettype, parameters);
-   declares a C++ alias called GNULIB_NAMESPACE::func
-   that redirects to the system provided function func, if GNULIB_NAMESPACE
-   is defined.
-   Example:
-     _GL_CXXALIAS_SYS (open, int, (const char *filename, int flags, ...));
-
-   Wrapping func in an object with an inline conversion operator
-   avoids a reference to func unless GNULIB_NAMESPACE::func is
-   actually used in the program.  */
-#if defined __cplusplus && defined GNULIB_NAMESPACE
-# define _GL_CXXALIAS_SYS(func,rettype,parameters)            \
-    namespace GNULIB_NAMESPACE                                \
-    {                                                         \
-      static const struct _gl_ ## func ## _wrapper            \
-      {                                                       \
-        typedef rettype (*type) parameters;                   \
-                                                              \
-        inline operator type () const                         \
-        {                                                     \
-          return ::func;                                      \
-        }                                                     \
-      } func = {};                                            \
-    }                                                         \
-    _GL_EXTERN_C int _gl_cxxalias_dummy
-#else
-# define _GL_CXXALIAS_SYS(func,rettype,parameters) \
-    _GL_EXTERN_C int _gl_cxxalias_dummy
-#endif
-
-/* _GL_CXXALIAS_SYS_CAST (func, rettype, parameters);
-   is like  _GL_CXXALIAS_SYS (func, rettype, parameters);
-   except that the C function func may have a slightly different declaration.
-   A cast is used to silence the "invalid conversion" error that would
-   otherwise occur.  */
-#if defined __cplusplus && defined GNULIB_NAMESPACE
-# define _GL_CXXALIAS_SYS_CAST(func,rettype,parameters) \
-    namespace GNULIB_NAMESPACE                          \
-    {                                                   \
-      static const struct _gl_ ## func ## _wrapper      \
-      {                                                 \
-        typedef rettype (*type) parameters;             \
-                                                        \
-        inline operator type () const                   \
-        {                                               \
-          return reinterpret_cast<type>(::func);        \
-        }                                               \
-      } func = {};                                      \
-    }                                                   \
-    _GL_EXTERN_C int _gl_cxxalias_dummy
-#else
-# define _GL_CXXALIAS_SYS_CAST(func,rettype,parameters) \
-    _GL_EXTERN_C int _gl_cxxalias_dummy
-#endif
-
-/* _GL_CXXALIAS_SYS_CAST2 (func, rettype, parameters, rettype2, parameters2);
-   is like  _GL_CXXALIAS_SYS (func, rettype, parameters);
-   except that the C function is picked among a set of overloaded functions,
-   namely the one with rettype2 and parameters2.  Two consecutive casts
-   are used to silence the "cannot find a match" and "invalid conversion"
-   errors that would otherwise occur.  */
-#if defined __cplusplus && defined GNULIB_NAMESPACE
-  /* The outer cast must be a reinterpret_cast.
-     The inner cast: When the function is defined as a set of overloaded
-     functions, it works as a static_cast<>, choosing the designated variant.
-     When the function is defined as a single variant, it works as a
-     reinterpret_cast<>. The parenthesized cast syntax works both ways.  */
-# define _GL_CXXALIAS_SYS_CAST2(func,rettype,parameters,rettype2,parameters2) \
-    namespace GNULIB_NAMESPACE                                                \
-    {                                                                         \
-      static const struct _gl_ ## func ## _wrapper                            \
-      {                                                                       \
-        typedef rettype (*type) parameters;                                   \
-                                                                              \
-        inline operator type () const                                         \
-        {                                                                     \
-          return reinterpret_cast<type>((rettype2 (*) parameters2)(::func));  \
-        }                                                                     \
-      } func = {};                                                            \
-    }                                                                         \
-    _GL_EXTERN_C int _gl_cxxalias_dummy
-#else
-# define _GL_CXXALIAS_SYS_CAST2(func,rettype,parameters,rettype2,parameters2) \
-    _GL_EXTERN_C int _gl_cxxalias_dummy
-#endif
-
-/* _GL_CXXALIASWARN (func);
-   causes a warning to be emitted when ::func is used but not when
-   GNULIB_NAMESPACE::func is used.  func must be defined without overloaded
-   variants.  */
-#if defined __cplusplus && defined GNULIB_NAMESPACE
-# define _GL_CXXALIASWARN(func) \
-   _GL_CXXALIASWARN_1 (func, GNULIB_NAMESPACE)
-# define _GL_CXXALIASWARN_1(func,namespace) \
-   _GL_CXXALIASWARN_2 (func, namespace)
-/* To work around GCC bug <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43881>,
-   we enable the warning only when not optimizing.  */
-# if !(defined __GNUC__ && !defined __clang__ && __OPTIMIZE__)
-#  define _GL_CXXALIASWARN_2(func,namespace) \
-    _GL_WARN_ON_USE (func, \
-                     "The symbol ::" #func " refers to the system function. " \
-                     "Use " #namespace "::" #func " instead.")
-# elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING
-#  define _GL_CXXALIASWARN_2(func,namespace) \
-     extern __typeof__ (func) func
-# else
-#  define _GL_CXXALIASWARN_2(func,namespace) \
-     _GL_EXTERN_C int _gl_cxxalias_dummy
-# endif
-#else
-# define _GL_CXXALIASWARN(func) \
-    _GL_EXTERN_C int _gl_cxxalias_dummy
-#endif
-
-/* _GL_CXXALIASWARN1 (func, rettype, parameters_and_attributes);
-   causes a warning to be emitted when the given overloaded variant of ::func
-   is used but not when GNULIB_NAMESPACE::func is used.  */
-#if defined __cplusplus && defined GNULIB_NAMESPACE
-# define _GL_CXXALIASWARN1(func,rettype,parameters_and_attributes) \
-   _GL_CXXALIASWARN1_1 (func, rettype, parameters_and_attributes, \
-                        GNULIB_NAMESPACE)
-# define _GL_CXXALIASWARN1_1(func,rettype,parameters_and_attributes,namespace) 
\
-   _GL_CXXALIASWARN1_2 (func, rettype, parameters_and_attributes, namespace)
-/* To work around GCC bug <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=43881>,
-   we enable the warning only when not optimizing.  */
-# if !(defined __GNUC__ && !defined __clang__ && __OPTIMIZE__)
-#  define 
_GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \
-    _GL_WARN_ON_USE_CXX (func, rettype, rettype, parameters_and_attributes, \
-                         "The symbol ::" #func " refers to the system 
function. " \
-                         "Use " #namespace "::" #func " instead.")
-# else
-#  define 
_GL_CXXALIASWARN1_2(func,rettype,parameters_and_attributes,namespace) \
-     _GL_EXTERN_C int _gl_cxxalias_dummy
-# endif
-#else
-# define _GL_CXXALIASWARN1(func,rettype,parameters_and_attributes) \
-    _GL_EXTERN_C int _gl_cxxalias_dummy
-#endif
-
-#endif /* _GL_CXXDEFS_H */
-
-/* The definition of _GL_ARG_NONNULL is copied here.  */
-/* A C macro for declaring that specific arguments must not be NULL.
-   Copyright (C) 2009-2023 Free Software Foundation, Inc.
-
-   This program is free software: you can redistribute it and/or modify it
-   under the terms of the GNU Lesser General Public License as published
-   by the Free Software Foundation; either version 2 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public License
-   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
-
-/* _GL_ARG_NONNULL((n,...,m)) tells the compiler and static analyzer tools
-   that the values passed as arguments n, ..., m must be non-NULL pointers.
-   n = 1 stands for the first argument, n = 2 for the second argument etc.  */
-#ifndef _GL_ARG_NONNULL
-# if __GNUC__ > 3 || (__GNUC__ == 3 && __GNUC_MINOR__ >= 3) || defined 
__clang__
-#  define _GL_ARG_NONNULL(params) __attribute__ ((__nonnull__ params))
-# else
-#  define _GL_ARG_NONNULL(params)
-# endif
-#endif
-
-/* The definition of _GL_WARN_ON_USE is copied here.  */
-/* A C macro for emitting warnings if a function is used.
-   Copyright (C) 2010-2023 Free Software Foundation, Inc.
-
-   This program is free software: you can redistribute it and/or modify it
-   under the terms of the GNU Lesser General Public License as published
-   by the Free Software Foundation; either version 2 of the License, or
-   (at your option) any later version.
-
-   This program is distributed in the hope that it will be useful,
-   but WITHOUT ANY WARRANTY; without even the implied warranty of
-   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
-   Lesser General Public License for more details.
-
-   You should have received a copy of the GNU Lesser General Public License
-   along with this program.  If not, see <https://www.gnu.org/licenses/>.  */
-
-/* _GL_WARN_ON_USE (function, "literal string") issues a declaration
-   for FUNCTION which will then trigger a compiler warning containing
-   the text of "literal string" anywhere that function is called, if
-   supported by the compiler.  If the compiler does not support this
-   feature, the macro expands to an unused extern declaration.
-
-   _GL_WARN_ON_USE_ATTRIBUTE ("literal string") expands to the
-   attribute used in _GL_WARN_ON_USE.  If the compiler does not support
-   this feature, it expands to empty.
-
-   These macros are useful for marking a function as a potential
-   portability trap, with the intent that "literal string" include
-   instructions on the replacement function that should be used
-   instead.
-   _GL_WARN_ON_USE is for functions with 'extern' linkage.
-   _GL_WARN_ON_USE_ATTRIBUTE is for functions with 'static' or 'inline'
-   linkage.
-
-   However, one of the reasons that a function is a portability trap is
-   if it has the wrong signature.  Declaring FUNCTION with a different
-   signature in C is a compilation error, so this macro must use the
-   same type as any existing declaration so that programs that avoid
-   the problematic FUNCTION do not fail to compile merely because they
-   included a header that poisoned the function.  But this implies that
-   _GL_WARN_ON_USE is only safe to use if FUNCTION is known to already
-   have a declaration.  Use of this macro implies that there must not
-   be any other macro hiding the declaration of FUNCTION; but
-   undefining FUNCTION first is part of the poisoning process anyway
-   (although for symbols that are provided only via a macro, the result
-   is a compilation error rather than a warning containing
-   "literal string").  Also note that in C++, it is only safe to use if
-   FUNCTION has no overloads.
-
-   For an example, it is possible to poison 'getline' by:
-   - adding a call to gl_WARN_ON_USE_PREPARE([[#include <stdio.h>]],
-     [getline]) in configure.ac, which potentially defines
-     HAVE_RAW_DECL_GETLINE
-   - adding this code to a header that wraps the system <stdio.h>:
-     #undef getline
-     #if HAVE_RAW_DECL_GETLINE
-     _GL_WARN_ON_USE (getline, "getline is required by POSIX 2008, but"
-       "not universally present; use the gnulib module getline");
-     #endif
-
-   It is not possible to directly poison global variables.  But it is
-   possible to write a wrapper accessor function, and poison that
-   (less common usage, like &environ, will cause a compilation error
-   rather than issue the nice warning, but the end result of informing
-   the developer about their portability problem is still achieved):
-     #if HAVE_RAW_DECL_ENVIRON
-     static char ***
-     rpl_environ (void) { return &environ; }
-     _GL_WARN_ON_USE (rpl_environ, "environ is not always properly declared");
-     # undef environ
-     # define environ (*rpl_environ ())
-     #endif
-   or better (avoiding contradictory use of 'static' and 'extern'):
-     #if HAVE_RAW_DECL_ENVIRON
-     static char ***
-     _GL_WARN_ON_USE_ATTRIBUTE ("environ is not always properly declared")
-     rpl_environ (void) { return &environ; }
-     # undef environ
-     # define environ (*rpl_environ ())
-     #endif
-   */
-#ifndef _GL_WARN_ON_USE
-
-# if 4 < __GNUC__ || (__GNUC__ == 4 && 3 <= __GNUC_MINOR__)
-/* A compiler attribute is available in gcc versions 4.3.0 and later.  */
-#  define _GL_WARN_ON_USE(function, message) \
-_GL_WARN_EXTERN_C __typeof__ (function) function __attribute__ ((__warning__ 
(message)))
-#  define _GL_WARN_ON_USE_ATTRIBUTE(message) \
-  __attribute__ ((__warning__ (message)))
-# elif __clang_major__ >= 4
-/* Another compiler attribute is available in clang.  */
-#  define _GL_WARN_ON_USE(function, message) \
-_GL_WARN_EXTERN_C __typeof__ (function) function \
-  __attribute__ ((__diagnose_if__ (1, message, "warning")))
-#  define _GL_WARN_ON_USE_ATTRIBUTE(message) \
-  __attribute__ ((__diagnose_if__ (1, message, "warning")))
-# elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING
-/* Verify the existence of the function.  */
-#  define _GL_WARN_ON_USE(function, message) \
-_GL_WARN_EXTERN_C __typeof__ (function) function
-#  define _GL_WARN_ON_USE_ATTRIBUTE(message)
-# else /* Unsupported.  */
-#  define _GL_WARN_ON_USE(function, message) \
-_GL_WARN_EXTERN_C int _gl_warn_on_use
-#  define _GL_WARN_ON_USE_ATTRIBUTE(message)
-# endif
-#endif
-
-/* _GL_WARN_ON_USE_CXX (function, rettype_gcc, rettype_clang, 
parameters_and_attributes, "message")
-   is like _GL_WARN_ON_USE (function, "message"), except that in C++ mode the
-   function is declared with the given prototype, consisting of return type,
-   parameters, and attributes.
-   This variant is useful for overloaded functions in C++. _GL_WARN_ON_USE does
-   not work in this case.  */
-#ifndef _GL_WARN_ON_USE_CXX
-# if !defined __cplusplus
-#  define 
_GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg)
 \
-     _GL_WARN_ON_USE (function, msg)
-# else
-#  if 4 < __GNUC__ || (__GNUC__ == 4 && 3 <= __GNUC_MINOR__)
-/* A compiler attribute is available in gcc versions 4.3.0 and later.  */
-#   define 
_GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg)
 \
-extern rettype_gcc function parameters_and_attributes \
-  __attribute__ ((__warning__ (msg)))
-#  elif __clang_major__ >= 4
-/* Another compiler attribute is available in clang.  */
-#   define 
_GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg)
 \
-extern rettype_clang function parameters_and_attributes \
-  __attribute__ ((__diagnose_if__ (1, msg, "warning")))
-#  elif __GNUC__ >= 3 && GNULIB_STRICT_CHECKING
-/* Verify the existence of the function.  */
-#   define 
_GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg)
 \
-extern rettype_gcc function parameters_and_attributes
-#  else /* Unsupported.  */
-#   define 
_GL_WARN_ON_USE_CXX(function,rettype_gcc,rettype_clang,parameters_and_attributes,msg)
 \
-_GL_WARN_EXTERN_C int _gl_warn_on_use
-#  endif
-# endif
-#endif
-
-/* _GL_WARN_EXTERN_C declaration;
-   performs the declaration with C linkage.  */
-#ifndef _GL_WARN_EXTERN_C
-# if defined __cplusplus
-#  define _GL_WARN_EXTERN_C extern "C"
-# else
-#  define _GL_WARN_EXTERN_C extern
-# endif
-#endif
-
-#ifdef __cplusplus
-/* Helper macros to define type-generic function FUNC as overloaded functions,
-   rather than as macros like in C.  POSIX declares these with an argument of
-   real-floating (that is, one of float, double, or long double).  */
-# define _GL_MATH_CXX_REAL_FLOATING_DECL_1(func) \
-static inline int                                                   \
-_gl_cxx_ ## func ## f (float f)                                     \
-{                                                                   \
-  return func (f);                                                  \
-}                                                                   \
-static inline int                                                   \
-_gl_cxx_ ## func ## d (double d)                                    \
-{                                                                   \
-  return func (d);                                                  \
-}                                                                   \
-static inline int                                                   \
-_gl_cxx_ ## func ## l (long double l)                               \
-{                                                                   \
-  return func (l);                                                  \
-}
-# define _GL_MATH_CXX_REAL_FLOATING_DECL_2(func,rpl_func,rettype) \
-_GL_BEGIN_NAMESPACE                                                 \
-inline rettype                                                      \
-rpl_func (float f)                                                  \
-{                                                                   \
-  return _gl_cxx_ ## func ## f (f);                                 \
-}                                                                   \
-inline rettype                                                      \
-rpl_func (double d)                                                 \
-{                                                                   \
-  return _gl_cxx_ ## func ## d (d);                                 \
-}                                                                   \
-inline rettype                                                      \
-rpl_func (long double l)                                            \
-{                                                                   \
-  return _gl_cxx_ ## func ## l (l);                                 \
-}                                                                   \
-_GL_END_NAMESPACE
-#endif
-
-/* Helper macros to define a portability warning for the
-   classification macro FUNC called with VALUE.  POSIX declares the
-   classification macros with an argument of real-floating (that is,
-   one of float, double, or long double).  */
-#define _GL_WARN_REAL_FLOATING_DECL(func) \
-_GL_MATH_INLINE int                                                       \
-_GL_WARN_ON_USE_ATTRIBUTE (#func " is unportable - "                      \
-                           "use gnulib module " #func " for portability") \
-rpl_ ## func ## f (float f)                                               \
-{                                                                         \
-  return func (f);                                                        \
-}                                                                         \
-_GL_MATH_INLINE int                                                       \
-_GL_WARN_ON_USE_ATTRIBUTE (#func " is unportable - "                      \
-                           "use gnulib module " #func " for portability") \
-rpl_ ## func ## d (double d)                                              \
-{                                                                         \
-  return func (d);                                                        \
-}                                                                         \
-_GL_MATH_INLINE int                                                       \
-_GL_WARN_ON_USE_ATTRIBUTE (#func " is unportable - "                      \
-                           "use gnulib module " #func " for portability") \
-rpl_ ## func ## l (long double l)                                         \
-{                                                                         \
-  return func (l);                                                        \
-}
-#define _GL_WARN_REAL_FLOATING_IMPL(func, value) \
-  (sizeof (value) == sizeof (float) ? rpl_ ## func ## f (value)     \
-   : sizeof (value) == sizeof (double) ? rpl_ ## func ## d (value)  \
-   : rpl_ ## func ## l (value))
-
-
-#if 0
-/* Pull in a function that fixes the 'int' to 'long double' conversion
-   of glibc 2.7.  */
-_GL_EXTERN_C void _Qp_itoq (long double *, int);
-static void (*_gl_math_fix_itold) (long double *, int) = _Qp_itoq;
-#endif
-
-
-/* POSIX allows platforms that don't support NAN.  But all major
-   machines in the past 15 years have supported something close to
-   IEEE NaN, so we define this unconditionally.  We also must define
-   it on platforms like Solaris 10, where NAN is present but defined
-   as a function pointer rather than a floating point constant.  */
-#if !defined NAN || 0
-# if !GNULIB_defined_NAN
-#  undef NAN
-  /* The Compaq (ex-DEC) C 6.4 compiler and the Microsoft MSVC 9 compiler
-     choke on the expression 0.0 / 0.0.  */
-#  if defined __DECC || defined _MSC_VER
-_GL_MATH_INLINE float
-_NaN ()
-{
-  static float zero = 0.0f;
-  return zero / zero;
-}
-#   define NAN (_NaN())
-#  else
-#   define NAN (0.0f / 0.0f)
-#  endif
-#  define GNULIB_defined_NAN 1
-# endif
-#endif
-
-/* Solaris 10 defines HUGE_VAL, but as a function pointer rather
-   than a floating point constant.  */
-#if 0
-# undef HUGE_VALF
-# define HUGE_VALF (1.0f / 0.0f)
-# undef HUGE_VAL
-# define HUGE_VAL (1.0 / 0.0)
-# undef HUGE_VALL
-# define HUGE_VALL (1.0L / 0.0L)
-#endif
-
-/* HUGE_VALF is a 'float' Infinity.  */
-#ifndef HUGE_VALF
-# if defined _MSC_VER
-/* The Microsoft MSVC 9 compiler chokes on the expression 1.0f / 0.0f.  */
-#  define HUGE_VALF (1e25f * 1e25f)
-# else
-#  define HUGE_VALF (1.0f / 0.0f)
-# endif
-#endif
-
-/* HUGE_VAL is a 'double' Infinity.  */
-#ifndef HUGE_VAL
-# if defined _MSC_VER
-/* The Microsoft MSVC 9 compiler chokes on the expression 1.0 / 0.0.  */
-#  define HUGE_VAL (1e250 * 1e250)
-# else
-#  define HUGE_VAL (1.0 / 0.0)
-# endif
-#endif
-
-/* HUGE_VALL is a 'long double' Infinity.  */
-#ifndef HUGE_VALL
-# if defined _MSC_VER
-/* The Microsoft MSVC 9 compiler chokes on the expression 1.0L / 0.0L.  */
-#  define HUGE_VALL (1e250L * 1e250L)
-# else
-#  define HUGE_VALL (1.0L / 0.0L)
-# endif
-#endif
-
-
-#if defined FP_ILOGB0 && defined FP_ILOGBNAN
- /* Ensure FP_ILOGB0 and FP_ILOGBNAN are correct.  */
-# if defined __HAIKU__
-  /* Haiku: match what ilogb() does */
-#  undef FP_ILOGB0
-#  undef FP_ILOGBNAN
-#  define FP_ILOGB0   (- 2147483647 - 1) /* INT_MIN */
-#  define FP_ILOGBNAN (- 2147483647 - 1) /* INT_MIN */
-# endif
-#else
- /* Ensure FP_ILOGB0 and FP_ILOGBNAN are defined.  */
-# if defined __NetBSD__ || defined __sgi
-  /* NetBSD, IRIX 6.5: match what ilogb() does */
-#  define FP_ILOGB0   (- 2147483647 - 1) /* INT_MIN */
-#  define FP_ILOGBNAN (- 2147483647 - 1) /* INT_MIN */
-# elif defined _AIX
-  /* AIX 5.1: match what ilogb() does in AIX >= 5.2 */
-#  define FP_ILOGB0   (- 2147483647 - 1) /* INT_MIN */
-#  define FP_ILOGBNAN 2147483647 /* INT_MAX */
-# elif defined __sun
-  /* Solaris 9: match what ilogb() does */
-#  define FP_ILOGB0   (- 2147483647) /* - INT_MAX */
-#  define FP_ILOGBNAN 2147483647 /* INT_MAX */
-# else
-  /* Gnulib defined values.  */
-#  define FP_ILOGB0   (- 2147483647) /* - INT_MAX */
-#  define FP_ILOGBNAN (- 2147483647 - 1) /* INT_MIN */
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef acosf
-#   define acosf rpl_acosf
-#  endif
-_GL_FUNCDECL_RPL (acosf, float, (float x));
-_GL_CXXALIAS_RPL (acosf, float, (float x));
-# else
-#  if !1
-#   undef acosf
-_GL_FUNCDECL_SYS (acosf, float, (float x));
-#  endif
-_GL_CXXALIAS_SYS (acosf, float, (float x));
-# endif
-_GL_CXXALIASWARN (acosf);
-#elif defined GNULIB_POSIXCHECK
-# undef acosf
-# if HAVE_RAW_DECL_ACOSF
-_GL_WARN_ON_USE (acosf, "acosf is unportable - "
-                 "use gnulib module acosf for portability");
-# endif
-#endif
-
-#if 0
-# if !1 || !1
-#  undef acosl
-_GL_FUNCDECL_SYS (acosl, long double, (long double x));
-# endif
-_GL_CXXALIAS_SYS (acosl, long double, (long double x));
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (acosl);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef acosl
-# if HAVE_RAW_DECL_ACOSL
-_GL_WARN_ON_USE (acosl, "acosl is unportable - "
-                 "use gnulib module acosl for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef asinf
-#   define asinf rpl_asinf
-#  endif
-_GL_FUNCDECL_RPL (asinf, float, (float x));
-_GL_CXXALIAS_RPL (asinf, float, (float x));
-# else
-#  if !1
-#   undef asinf
-_GL_FUNCDECL_SYS (asinf, float, (float x));
-#  endif
-_GL_CXXALIAS_SYS (asinf, float, (float x));
-# endif
-_GL_CXXALIASWARN (asinf);
-#elif defined GNULIB_POSIXCHECK
-# undef asinf
-# if HAVE_RAW_DECL_ASINF
-_GL_WARN_ON_USE (asinf, "asinf is unportable - "
-                 "use gnulib module asinf for portability");
-# endif
-#endif
-
-#if 0
-# if !1 || !1
-#  undef asinl
-_GL_FUNCDECL_SYS (asinl, long double, (long double x));
-# endif
-_GL_CXXALIAS_SYS (asinl, long double, (long double x));
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (asinl);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef asinl
-# if HAVE_RAW_DECL_ASINL
-_GL_WARN_ON_USE (asinl, "asinl is unportable - "
-                 "use gnulib module asinl for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef atanf
-#   define atanf rpl_atanf
-#  endif
-_GL_FUNCDECL_RPL (atanf, float, (float x));
-_GL_CXXALIAS_RPL (atanf, float, (float x));
-# else
-#  if !1
-#   undef atanf
-_GL_FUNCDECL_SYS (atanf, float, (float x));
-#  endif
-_GL_CXXALIAS_SYS (atanf, float, (float x));
-# endif
-_GL_CXXALIASWARN (atanf);
-#elif defined GNULIB_POSIXCHECK
-# undef atanf
-# if HAVE_RAW_DECL_ATANF
-_GL_WARN_ON_USE (atanf, "atanf is unportable - "
-                 "use gnulib module atanf for portability");
-# endif
-#endif
-
-#if 0
-# if !1 || !1
-#  undef atanl
-_GL_FUNCDECL_SYS (atanl, long double, (long double x));
-# endif
-_GL_CXXALIAS_SYS (atanl, long double, (long double x));
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (atanl);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef atanl
-# if HAVE_RAW_DECL_ATANL
-_GL_WARN_ON_USE (atanl, "atanl is unportable - "
-                 "use gnulib module atanl for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef atan2f
-#   define atan2f rpl_atan2f
-#  endif
-_GL_FUNCDECL_RPL (atan2f, float, (float y, float x));
-_GL_CXXALIAS_RPL (atan2f, float, (float y, float x));
-# else
-#  if !1
-#   undef atan2f
-_GL_FUNCDECL_SYS (atan2f, float, (float y, float x));
-#  endif
-_GL_CXXALIAS_SYS (atan2f, float, (float y, float x));
-# endif
-_GL_CXXALIASWARN (atan2f);
-#elif defined GNULIB_POSIXCHECK
-# undef atan2f
-# if HAVE_RAW_DECL_ATAN2F
-_GL_WARN_ON_USE (atan2f, "atan2f is unportable - "
-                 "use gnulib module atan2f for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef cbrtf
-#   define cbrtf rpl_cbrtf
-#  endif
-_GL_FUNCDECL_RPL (cbrtf, float, (float x));
-_GL_CXXALIAS_RPL (cbrtf, float, (float x));
-# else
-#  if !1
-_GL_FUNCDECL_SYS (cbrtf, float, (float x));
-#  endif
-_GL_CXXALIAS_SYS (cbrtf, float, (float x));
-# endif
-_GL_CXXALIASWARN (cbrtf);
-#elif defined GNULIB_POSIXCHECK
-# undef cbrtf
-# if HAVE_RAW_DECL_CBRTF
-_GL_WARN_ON_USE (cbrtf, "cbrtf is unportable - "
-                 "use gnulib module cbrtf for portability");
-# endif
-#endif
-
-#if 0
-# if !1
-_GL_FUNCDECL_SYS (cbrt, double, (double x));
-# endif
-_GL_CXXALIAS_SYS (cbrt, double, (double x));
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN1 (cbrt, double, (double x));
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef cbrt
-# if HAVE_RAW_DECL_CBRT
-_GL_WARN_ON_USE (cbrt, "cbrt is unportable - "
-                 "use gnulib module cbrt for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef cbrtl
-#   define cbrtl rpl_cbrtl
-#  endif
-_GL_FUNCDECL_RPL (cbrtl, long double, (long double x));
-_GL_CXXALIAS_RPL (cbrtl, long double, (long double x));
-# else
-#  if !1
-_GL_FUNCDECL_SYS (cbrtl, long double, (long double x));
-#  endif
-_GL_CXXALIAS_SYS (cbrtl, long double, (long double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (cbrtl);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef cbrtl
-# if HAVE_RAW_DECL_CBRTL
-_GL_WARN_ON_USE (cbrtl, "cbrtl is unportable - "
-                 "use gnulib module cbrtl for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef ceilf
-#   define ceilf rpl_ceilf
-#  endif
-_GL_FUNCDECL_RPL (ceilf, float, (float x));
-_GL_CXXALIAS_RPL (ceilf, float, (float x));
-# else
-#  if !1
-#   undef ceilf
-_GL_FUNCDECL_SYS (ceilf, float, (float x));
-#  endif
-_GL_CXXALIAS_SYS (ceilf, float, (float x));
-# endif
-_GL_CXXALIASWARN (ceilf);
-#elif defined GNULIB_POSIXCHECK
-# undef ceilf
-# if HAVE_RAW_DECL_CEILF
-_GL_WARN_ON_USE (ceilf, "ceilf is unportable - "
-                 "use gnulib module ceilf for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef ceil
-#   define ceil rpl_ceil
-#  endif
-_GL_FUNCDECL_RPL (ceil, double, (double x));
-_GL_CXXALIAS_RPL (ceil, double, (double x));
-# else
-_GL_CXXALIAS_SYS (ceil, double, (double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN1 (ceil, double, (double x));
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef ceill
-#   define ceill rpl_ceill
-#  endif
-_GL_FUNCDECL_RPL (ceill, long double, (long double x));
-_GL_CXXALIAS_RPL (ceill, long double, (long double x));
-# else
-#  if !1
-#   undef ceill
-_GL_FUNCDECL_SYS (ceill, long double, (long double x));
-#  endif
-_GL_CXXALIAS_SYS (ceill, long double, (long double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (ceill);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef ceill
-# if HAVE_RAW_DECL_CEILL
-_GL_WARN_ON_USE (ceill, "ceill is unportable - "
-                 "use gnulib module ceill for portability");
-# endif
-#endif
-
-
-#if 0
-# if !1
-#  undef copysignf
-_GL_FUNCDECL_SYS (copysignf, float, (float x, float y));
-# endif
-_GL_CXXALIAS_SYS (copysignf, float, (float x, float y));
-_GL_CXXALIASWARN (copysignf);
-#elif defined GNULIB_POSIXCHECK
-# undef copysignf
-# if HAVE_RAW_DECL_COPYSIGNF
-_GL_WARN_ON_USE (copysignf, "copysignf is unportable - "
-                 "use gnulib module copysignf for portability");
-# endif
-#endif
-
-#if 0
-# if !1
-_GL_FUNCDECL_SYS (copysign, double, (double x, double y));
-# endif
-_GL_CXXALIAS_SYS (copysign, double, (double x, double y));
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN1 (copysign, double, (double x, double y));
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef copysign
-# if HAVE_RAW_DECL_COPYSIGN
-_GL_WARN_ON_USE (copysign, "copysign is unportable - "
-                 "use gnulib module copysign for portability");
-# endif
-#endif
-
-#if 0
-# if !1
-_GL_FUNCDECL_SYS (copysignl, long double, (long double x, long double y));
-# endif
-_GL_CXXALIAS_SYS (copysignl, long double, (long double x, long double y));
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (copysignl);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef copysignl
-# if HAVE_RAW_DECL_COPYSIGNL
-_GL_WARN_ON_USE (copysign, "copysignl is unportable - "
-                 "use gnulib module copysignl for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef cosf
-#   define cosf rpl_cosf
-#  endif
-_GL_FUNCDECL_RPL (cosf, float, (float x));
-_GL_CXXALIAS_RPL (cosf, float, (float x));
-# else
-#  if !1
-#   undef cosf
-_GL_FUNCDECL_SYS (cosf, float, (float x));
-#  endif
-_GL_CXXALIAS_SYS (cosf, float, (float x));
-# endif
-_GL_CXXALIASWARN (cosf);
-#elif defined GNULIB_POSIXCHECK
-# undef cosf
-# if HAVE_RAW_DECL_COSF
-_GL_WARN_ON_USE (cosf, "cosf is unportable - "
-                 "use gnulib module cosf for portability");
-# endif
-#endif
-
-#if 0
-# if !1 || !1
-#  undef cosl
-_GL_FUNCDECL_SYS (cosl, long double, (long double x));
-# endif
-_GL_CXXALIAS_SYS (cosl, long double, (long double x));
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (cosl);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef cosl
-# if HAVE_RAW_DECL_COSL
-_GL_WARN_ON_USE (cosl, "cosl is unportable - "
-                 "use gnulib module cosl for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef coshf
-#   define coshf rpl_coshf
-#  endif
-_GL_FUNCDECL_RPL (coshf, float, (float x));
-_GL_CXXALIAS_RPL (coshf, float, (float x));
-# else
-#  if !1
-#   undef coshf
-_GL_FUNCDECL_SYS (coshf, float, (float x));
-#  endif
-_GL_CXXALIAS_SYS (coshf, float, (float x));
-# endif
-_GL_CXXALIASWARN (coshf);
-#elif defined GNULIB_POSIXCHECK
-# undef coshf
-# if HAVE_RAW_DECL_COSHF
-_GL_WARN_ON_USE (coshf, "coshf is unportable - "
-                 "use gnulib module coshf for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef expf
-#   define expf rpl_expf
-#  endif
-_GL_FUNCDECL_RPL (expf, float, (float x));
-_GL_CXXALIAS_RPL (expf, float, (float x));
-# else
-#  if !1
-#   undef expf
-_GL_FUNCDECL_SYS (expf, float, (float x));
-#  endif
-_GL_CXXALIAS_SYS (expf, float, (float x));
-# endif
-_GL_CXXALIASWARN (expf);
-#elif defined GNULIB_POSIXCHECK
-# undef expf
-# if HAVE_RAW_DECL_EXPF
-_GL_WARN_ON_USE (expf, "expf is unportable - "
-                 "use gnulib module expf for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef expl
-#   define expl rpl_expl
-#  endif
-_GL_FUNCDECL_RPL (expl, long double, (long double x));
-_GL_CXXALIAS_RPL (expl, long double, (long double x));
-# else
-#  if !1 || !1
-#   undef expl
-_GL_FUNCDECL_SYS (expl, long double, (long double x));
-#  endif
-_GL_CXXALIAS_SYS (expl, long double, (long double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (expl);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef expl
-# if HAVE_RAW_DECL_EXPL
-_GL_WARN_ON_USE (expl, "expl is unportable - "
-                 "use gnulib module expl for portability");
-# endif
-#endif
-
-
-#if 0
-# if !1
-_GL_FUNCDECL_SYS (exp2f, float, (float x));
-# endif
-_GL_CXXALIAS_SYS (exp2f, float, (float x));
-_GL_CXXALIASWARN (exp2f);
-#elif defined GNULIB_POSIXCHECK
-# undef exp2f
-# if HAVE_RAW_DECL_EXP2F
-_GL_WARN_ON_USE (exp2f, "exp2f is unportable - "
-                 "use gnulib module exp2f for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef exp2
-#   define exp2 rpl_exp2
-#  endif
-_GL_FUNCDECL_RPL (exp2, double, (double x));
-_GL_CXXALIAS_RPL (exp2, double, (double x));
-# else
-#  if !1
-_GL_FUNCDECL_SYS (exp2, double, (double x));
-#  endif
-_GL_CXXALIAS_SYS (exp2, double, (double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN1 (exp2, double, (double x));
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef exp2
-# if HAVE_RAW_DECL_EXP2
-_GL_WARN_ON_USE (exp2, "exp2 is unportable - "
-                 "use gnulib module exp2 for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef exp2l
-#   define exp2l rpl_exp2l
-#  endif
-_GL_FUNCDECL_RPL (exp2l, long double, (long double x));
-_GL_CXXALIAS_RPL (exp2l, long double, (long double x));
-# else
-#  if !1
-#   undef exp2l
-_GL_FUNCDECL_SYS (exp2l, long double, (long double x));
-#  endif
-_GL_CXXALIAS_SYS (exp2l, long double, (long double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (exp2l);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef exp2l
-# if HAVE_RAW_DECL_EXP2L
-_GL_WARN_ON_USE (exp2l, "exp2l is unportable - "
-                 "use gnulib module exp2l for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef expm1f
-#   define expm1f rpl_expm1f
-#  endif
-_GL_FUNCDECL_RPL (expm1f, float, (float x));
-_GL_CXXALIAS_RPL (expm1f, float, (float x));
-# else
-#  if !1
-_GL_FUNCDECL_SYS (expm1f, float, (float x));
-#  endif
-_GL_CXXALIAS_SYS (expm1f, float, (float x));
-# endif
-_GL_CXXALIASWARN (expm1f);
-#elif defined GNULIB_POSIXCHECK
-# undef expm1f
-# if HAVE_RAW_DECL_EXPM1F
-_GL_WARN_ON_USE (expm1f, "expm1f is unportable - "
-                 "use gnulib module expm1f for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef expm1
-#   define expm1 rpl_expm1
-#  endif
-_GL_FUNCDECL_RPL (expm1, double, (double x));
-_GL_CXXALIAS_RPL (expm1, double, (double x));
-# else
-#  if !1
-_GL_FUNCDECL_SYS (expm1, double, (double x));
-#  endif
-_GL_CXXALIAS_SYS (expm1, double, (double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN1 (expm1, double, (double x));
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef expm1
-# if HAVE_RAW_DECL_EXPM1
-_GL_WARN_ON_USE (expm1, "expm1 is unportable - "
-                 "use gnulib module expm1 for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef expm1l
-#   define expm1l rpl_expm1l
-#  endif
-_GL_FUNCDECL_RPL (expm1l, long double, (long double x));
-_GL_CXXALIAS_RPL (expm1l, long double, (long double x));
-# else
-#  if !1
-#   undef expm1l
-#   if !(defined __cplusplus && defined _AIX)
-_GL_FUNCDECL_SYS (expm1l, long double, (long double x));
-#   endif
-#  endif
-_GL_CXXALIAS_SYS (expm1l, long double, (long double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (expm1l);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef expm1l
-# if HAVE_RAW_DECL_EXPM1L
-_GL_WARN_ON_USE (expm1l, "expm1l is unportable - "
-                 "use gnulib module expm1l for portability");
-# endif
-#endif
-
-
-#if 0
-# if !1
-#  undef fabsf
-_GL_FUNCDECL_SYS (fabsf, float, (float x));
-# endif
-_GL_CXXALIAS_SYS (fabsf, float, (float x));
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (fabsf);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef fabsf
-# if HAVE_RAW_DECL_FABSF
-_GL_WARN_ON_USE (fabsf, "fabsf is unportable - "
-                 "use gnulib module fabsf for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef fabsl
-#   define fabsl rpl_fabsl
-#  endif
-_GL_FUNCDECL_RPL (fabsl, long double, (long double x));
-_GL_CXXALIAS_RPL (fabsl, long double, (long double x));
-# else
-#  if !1
-#   undef fabsl
-_GL_FUNCDECL_SYS (fabsl, long double, (long double x));
-#  endif
-_GL_CXXALIAS_SYS (fabsl, long double, (long double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (fabsl);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef fabsl
-# if HAVE_RAW_DECL_FABSL
-_GL_WARN_ON_USE (fabsl, "fabsl is unportable - "
-                 "use gnulib module fabsl for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef floorf
-#   define floorf rpl_floorf
-#  endif
-_GL_FUNCDECL_RPL (floorf, float, (float x));
-_GL_CXXALIAS_RPL (floorf, float, (float x));
-# else
-#  if !1
-#   undef floorf
-_GL_FUNCDECL_SYS (floorf, float, (float x));
-#  endif
-_GL_CXXALIAS_SYS (floorf, float, (float x));
-# endif
-_GL_CXXALIASWARN (floorf);
-#elif defined GNULIB_POSIXCHECK
-# undef floorf
-# if HAVE_RAW_DECL_FLOORF
-_GL_WARN_ON_USE (floorf, "floorf is unportable - "
-                 "use gnulib module floorf for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef floor
-#   define floor rpl_floor
-#  endif
-_GL_FUNCDECL_RPL (floor, double, (double x));
-_GL_CXXALIAS_RPL (floor, double, (double x));
-# else
-_GL_CXXALIAS_SYS (floor, double, (double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN1 (floor, double, (double x));
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef floorl
-#   define floorl rpl_floorl
-#  endif
-_GL_FUNCDECL_RPL (floorl, long double, (long double x));
-_GL_CXXALIAS_RPL (floorl, long double, (long double x));
-# else
-#  if !1
-#   undef floorl
-_GL_FUNCDECL_SYS (floorl, long double, (long double x));
-#  endif
-_GL_CXXALIAS_SYS (floorl, long double, (long double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (floorl);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef floorl
-# if HAVE_RAW_DECL_FLOORL
-_GL_WARN_ON_USE (floorl, "floorl is unportable - "
-                 "use gnulib module floorl for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef fmaf
-#   define fmaf rpl_fmaf
-#  endif
-_GL_FUNCDECL_RPL (fmaf, float, (float x, float y, float z));
-_GL_CXXALIAS_RPL (fmaf, float, (float x, float y, float z));
-# else
-#  if !1
-#   undef fmaf
-_GL_FUNCDECL_SYS (fmaf, float, (float x, float y, float z));
-#  endif
-_GL_CXXALIAS_SYS (fmaf, float, (float x, float y, float z));
-# endif
-_GL_CXXALIASWARN (fmaf);
-#elif defined GNULIB_POSIXCHECK
-# undef fmaf
-# if HAVE_RAW_DECL_FMAF
-_GL_WARN_ON_USE (fmaf, "fmaf is unportable - "
-                 "use gnulib module fmaf for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef fma
-#   define fma rpl_fma
-#  endif
-_GL_FUNCDECL_RPL (fma, double, (double x, double y, double z));
-_GL_CXXALIAS_RPL (fma, double, (double x, double y, double z));
-# else
-#  if !1
-#   undef fma
-_GL_FUNCDECL_SYS (fma, double, (double x, double y, double z));
-#  endif
-_GL_CXXALIAS_SYS (fma, double, (double x, double y, double z));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN1 (fma, double, (double x, double y, double z));
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef fma
-# if HAVE_RAW_DECL_FMA
-_GL_WARN_ON_USE (fma, "fma is unportable - "
-                 "use gnulib module fma for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef fmal
-#   define fmal rpl_fmal
-#  endif
-_GL_FUNCDECL_RPL (fmal, long double,
-                  (long double x, long double y, long double z));
-_GL_CXXALIAS_RPL (fmal, long double,
-                  (long double x, long double y, long double z));
-# else
-#  if !1
-#   undef fmal
-#   if !(defined __cplusplus && defined _AIX)
-_GL_FUNCDECL_SYS (fmal, long double,
-                  (long double x, long double y, long double z));
-#   endif
-#  endif
-_GL_CXXALIAS_SYS (fmal, long double,
-                  (long double x, long double y, long double z));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (fmal);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef fmal
-# if HAVE_RAW_DECL_FMAL
-_GL_WARN_ON_USE (fmal, "fmal is unportable - "
-                 "use gnulib module fmal for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef fmodf
-#   define fmodf rpl_fmodf
-#  endif
-_GL_FUNCDECL_RPL (fmodf, float, (float x, float y));
-_GL_CXXALIAS_RPL (fmodf, float, (float x, float y));
-# else
-#  if !1
-#   undef fmodf
-_GL_FUNCDECL_SYS (fmodf, float, (float x, float y));
-#  endif
-_GL_CXXALIAS_SYS (fmodf, float, (float x, float y));
-# endif
-_GL_CXXALIASWARN (fmodf);
-#elif defined GNULIB_POSIXCHECK
-# undef fmodf
-# if HAVE_RAW_DECL_FMODF
-_GL_WARN_ON_USE (fmodf, "fmodf is unportable - "
-                 "use gnulib module fmodf for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef fmod
-#   define fmod rpl_fmod
-#  endif
-_GL_FUNCDECL_RPL (fmod, double, (double x, double y));
-_GL_CXXALIAS_RPL (fmod, double, (double x, double y));
-# else
-_GL_CXXALIAS_SYS (fmod, double, (double x, double y));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN1 (fmod, double, (double x, double y));
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef fmod
-# if HAVE_RAW_DECL_FMOD
-_GL_WARN_ON_USE (fmod, "fmod has portability problems - "
-                 "use gnulib module fmod for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef fmodl
-#   define fmodl rpl_fmodl
-#  endif
-_GL_FUNCDECL_RPL (fmodl, long double, (long double x, long double y));
-_GL_CXXALIAS_RPL (fmodl, long double, (long double x, long double y));
-# else
-#  if !1
-#   undef fmodl
-_GL_FUNCDECL_SYS (fmodl, long double, (long double x, long double y));
-#  endif
-_GL_CXXALIAS_SYS (fmodl, long double, (long double x, long double y));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (fmodl);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef fmodl
-# if HAVE_RAW_DECL_FMODL
-_GL_WARN_ON_USE (fmodl, "fmodl is unportable - "
-                 "use gnulib module fmodl for portability");
-# endif
-#endif
-
-
-/* Write x as
-     x = mantissa * 2^exp
-   where
-     If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
-     If x is zero: mantissa = x, exp = 0.
-     If x is infinite or NaN: mantissa = x, exp unspecified.
-   Store exp in *EXPPTR and return mantissa.  */
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef frexpf
-#   define frexpf rpl_frexpf
-#  endif
-_GL_FUNCDECL_RPL (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
-_GL_CXXALIAS_RPL (frexpf, float, (float x, int *expptr));
-# else
-#  if !1
-#   undef frexpf
-_GL_FUNCDECL_SYS (frexpf, float, (float x, int *expptr) _GL_ARG_NONNULL ((2)));
-#  endif
-_GL_CXXALIAS_SYS (frexpf, float, (float x, int *expptr));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (frexpf);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef frexpf
-# if HAVE_RAW_DECL_FREXPF
-_GL_WARN_ON_USE (frexpf, "frexpf is unportable - "
-                 "use gnulib module frexpf for portability");
-# endif
-#endif
-
-/* Write x as
-     x = mantissa * 2^exp
-   where
-     If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
-     If x is zero: mantissa = x, exp = 0.
-     If x is infinite or NaN: mantissa = x, exp unspecified.
-   Store exp in *EXPPTR and return mantissa.  */
-#if 1
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef frexp
-#   define frexp rpl_frexp
-#  endif
-_GL_FUNCDECL_RPL (frexp, double, (double x, int *expptr) _GL_ARG_NONNULL 
((2)));
-_GL_CXXALIAS_RPL (frexp, double, (double x, int *expptr));
-# else
-_GL_CXXALIAS_SYS (frexp, double, (double x, int *expptr));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN1 (frexp, double, (double x, int *expptr));
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef frexp
-/* Assume frexp is always declared.  */
-_GL_WARN_ON_USE (frexp, "frexp is unportable - "
-                 "use gnulib module frexp for portability");
-#endif
-
-/* Write x as
-     x = mantissa * 2^exp
-   where
-     If x finite and nonzero: 0.5 <= |mantissa| < 1.0.
-     If x is zero: mantissa = x, exp = 0.
-     If x is infinite or NaN: mantissa = x, exp unspecified.
-   Store exp in *EXPPTR and return mantissa.  */
-#if 1 && 0
-# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#  undef frexpl
-#  define frexpl rpl_frexpl
-# endif
-_GL_FUNCDECL_RPL (frexpl, long double,
-                  (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
-_GL_CXXALIAS_RPL (frexpl, long double, (long double x, int *expptr));
-#else
-# if !1
-_GL_FUNCDECL_SYS (frexpl, long double,
-                  (long double x, int *expptr) _GL_ARG_NONNULL ((2)));
-# endif
-# if 1
-_GL_CXXALIAS_SYS (frexpl, long double, (long double x, int *expptr));
-# endif
-#endif
-#if 1 && !(0 && !1)
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (frexpl);
-# endif
-#endif
-#if !1 && defined GNULIB_POSIXCHECK
-# undef frexpl
-# if HAVE_RAW_DECL_FREXPL
-_GL_WARN_ON_USE (frexpl, "frexpl is unportable - "
-                 "use gnulib module frexpl for portability");
-# endif
-#endif
-
-
-/* Return sqrt(x^2+y^2).  */
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef hypotf
-#   define hypotf rpl_hypotf
-#  endif
-_GL_FUNCDECL_RPL (hypotf, float, (float x, float y));
-_GL_CXXALIAS_RPL (hypotf, float, (float x, float y));
-# else
-#  if !1
-_GL_FUNCDECL_SYS (hypotf, float, (float x, float y));
-#  endif
-_GL_CXXALIAS_SYS (hypotf, float, (float x, float y));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (hypotf);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef hypotf
-# if HAVE_RAW_DECL_HYPOTF
-_GL_WARN_ON_USE (hypotf, "hypotf is unportable - "
-                 "use gnulib module hypotf for portability");
-# endif
-#endif
-
-/* Return sqrt(x^2+y^2).  */
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef hypot
-#   define hypot rpl_hypot
-#  endif
-_GL_FUNCDECL_RPL (hypot, double, (double x, double y));
-_GL_CXXALIAS_RPL (hypot, double, (double x, double y));
-# else
-_GL_CXXALIAS_SYS (hypot, double, (double x, double y));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN1 (hypot, double, (double x, double y));
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef hypot
-# if HAVE_RAW_DECL_HYPOT
-_GL_WARN_ON_USE (hypotf, "hypot has portability problems - "
-                 "use gnulib module hypot for portability");
-# endif
-#endif
-
-/* Return sqrt(x^2+y^2).  */
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef hypotl
-#   define hypotl rpl_hypotl
-#  endif
-_GL_FUNCDECL_RPL (hypotl, long double, (long double x, long double y));
-_GL_CXXALIAS_RPL (hypotl, long double, (long double x, long double y));
-# else
-#  if !1
-_GL_FUNCDECL_SYS (hypotl, long double, (long double x, long double y));
-#  endif
-_GL_CXXALIAS_SYS (hypotl, long double, (long double x, long double y));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (hypotl);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef hypotl
-# if HAVE_RAW_DECL_HYPOTL
-_GL_WARN_ON_USE (hypotl, "hypotl is unportable - "
-                 "use gnulib module hypotl for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef ilogbf
-#   define ilogbf rpl_ilogbf
-#  endif
-_GL_FUNCDECL_RPL (ilogbf, int, (float x));
-_GL_CXXALIAS_RPL (ilogbf, int, (float x));
-# else
-#  if !1
-_GL_FUNCDECL_SYS (ilogbf, int, (float x));
-#  endif
-_GL_CXXALIAS_SYS (ilogbf, int, (float x));
-# endif
-_GL_CXXALIASWARN (ilogbf);
-#elif defined GNULIB_POSIXCHECK
-# undef ilogbf
-# if HAVE_RAW_DECL_ILOGBF
-_GL_WARN_ON_USE (ilogbf, "ilogbf is unportable - "
-                 "use gnulib module ilogbf for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef ilogb
-#   define ilogb rpl_ilogb
-#  endif
-_GL_FUNCDECL_RPL (ilogb, int, (double x));
-_GL_CXXALIAS_RPL (ilogb, int, (double x));
-# else
-#  if !1
-_GL_FUNCDECL_SYS (ilogb, int, (double x));
-#  endif
-_GL_CXXALIAS_SYS (ilogb, int, (double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN1 (ilogb, int, (double x));
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef ilogb
-# if HAVE_RAW_DECL_ILOGB
-_GL_WARN_ON_USE (ilogb, "ilogb is unportable - "
-                 "use gnulib module ilogb for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef ilogbl
-#   define ilogbl rpl_ilogbl
-#  endif
-_GL_FUNCDECL_RPL (ilogbl, int, (long double x));
-_GL_CXXALIAS_RPL (ilogbl, int, (long double x));
-# else
-#  if !1
-#   undef ilogbl
-_GL_FUNCDECL_SYS (ilogbl, int, (long double x));
-#  endif
-_GL_CXXALIAS_SYS (ilogbl, int, (long double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (ilogbl);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef ilogbl
-# if HAVE_RAW_DECL_ILOGBL
-_GL_WARN_ON_USE (ilogbl, "ilogbl is unportable - "
-                 "use gnulib module ilogbl for portability");
-# endif
-#endif
-
-
-#if 1
-/* On native Windows, map 'j0' to '_j0', so that -loldnames is not
-   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
-   platforms by defining GNULIB_NAMESPACE::j0 always.  */
-# if defined _WIN32 && !defined __CYGWIN__
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef j0
-#   define j0 _j0
-#  endif
-_GL_CXXALIAS_MDA (j0, double, (double x));
-# else
-_GL_CXXALIAS_SYS (j0, double, (double x));
-# endif
-_GL_CXXALIASWARN (j0);
-#endif
-
-#if 1
-/* On native Windows, map 'j1' to '_j1', so that -loldnames is not
-   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
-   platforms by defining GNULIB_NAMESPACE::j1 always.  */
-# if defined _WIN32 && !defined __CYGWIN__
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef j1
-#   define j1 _j1
-#  endif
-_GL_CXXALIAS_MDA (j1, double, (double x));
-# else
-_GL_CXXALIAS_SYS (j1, double, (double x));
-# endif
-_GL_CXXALIASWARN (j1);
-#endif
-
-#if 1
-/* On native Windows, map 'jn' to '_jn', so that -loldnames is not
-   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
-   platforms by defining GNULIB_NAMESPACE::jn always.  */
-# if defined _WIN32 && !defined __CYGWIN__
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef jn
-#   define jn _jn
-#  endif
-_GL_CXXALIAS_MDA (jn, double, (int n, double x));
-# else
-_GL_CXXALIAS_SYS (jn, double, (int n, double x));
-# endif
-_GL_CXXALIASWARN (jn);
-#endif
-
-
-/* Return x * 2^exp.  */
-#if 0
-# if !1
-#  undef ldexpf
-_GL_FUNCDECL_SYS (ldexpf, float, (float x, int exp));
-# endif
-_GL_CXXALIAS_SYS (ldexpf, float, (float x, int exp));
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (ldexpf);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef ldexpf
-# if HAVE_RAW_DECL_LDEXPF
-_GL_WARN_ON_USE (ldexpf, "ldexpf is unportable - "
-                 "use gnulib module ldexpf for portability");
-# endif
-#endif
-
-/* Return x * 2^exp.  */
-#if 0 && 0
-# if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#  undef ldexpl
-#  define ldexpl rpl_ldexpl
-# endif
-_GL_FUNCDECL_RPL (ldexpl, long double, (long double x, int exp));
-_GL_CXXALIAS_RPL (ldexpl, long double, (long double x, int exp));
-#else
-# if !1
-_GL_FUNCDECL_SYS (ldexpl, long double, (long double x, int exp));
-# endif
-# if 0
-_GL_CXXALIAS_SYS (ldexpl, long double, (long double x, int exp));
-# endif
-#endif
-#if 0
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (ldexpl);
-# endif
-#endif
-#if !0 && defined GNULIB_POSIXCHECK
-# undef ldexpl
-# if HAVE_RAW_DECL_LDEXPL
-_GL_WARN_ON_USE (ldexpl, "ldexpl is unportable - "
-                 "use gnulib module ldexpl for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef logf
-#   define logf rpl_logf
-#  endif
-_GL_FUNCDECL_RPL (logf, float, (float x));
-_GL_CXXALIAS_RPL (logf, float, (float x));
-# else
-#  if !1
-#   undef logf
-_GL_FUNCDECL_SYS (logf, float, (float x));
-#  endif
-_GL_CXXALIAS_SYS (logf, float, (float x));
-# endif
-_GL_CXXALIASWARN (logf);
-#elif defined GNULIB_POSIXCHECK
-# undef logf
-# if HAVE_RAW_DECL_LOGF
-_GL_WARN_ON_USE (logf, "logf is unportable - "
-                 "use gnulib module logf for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef log
-#   define log rpl_log
-#  endif
-_GL_FUNCDECL_RPL (log, double, (double x));
-_GL_CXXALIAS_RPL (log, double, (double x));
-# else
-_GL_CXXALIAS_SYS (log, double, (double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN1 (log, double, (double x));
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef log
-# if HAVE_RAW_DECL_LOG
-_GL_WARN_ON_USE (log, "log has portability problems - "
-                 "use gnulib module log for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef logl
-#   define logl rpl_logl
-#  endif
-_GL_FUNCDECL_RPL (logl, long double, (long double x));
-_GL_CXXALIAS_RPL (logl, long double, (long double x));
-# else
-#  if !1 || !1
-#   undef logl
-_GL_FUNCDECL_SYS (logl, long double, (long double x));
-#  endif
-_GL_CXXALIAS_SYS (logl, long double, (long double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (logl);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef logl
-# if HAVE_RAW_DECL_LOGL
-_GL_WARN_ON_USE (logl, "logl is unportable - "
-                 "use gnulib module logl for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef log10f
-#   define log10f rpl_log10f
-#  endif
-_GL_FUNCDECL_RPL (log10f, float, (float x));
-_GL_CXXALIAS_RPL (log10f, float, (float x));
-# else
-#  if !1
-#   undef log10f
-_GL_FUNCDECL_SYS (log10f, float, (float x));
-#  endif
-_GL_CXXALIAS_SYS (log10f, float, (float x));
-# endif
-_GL_CXXALIASWARN (log10f);
-#elif defined GNULIB_POSIXCHECK
-# undef log10f
-# if HAVE_RAW_DECL_LOG10F
-_GL_WARN_ON_USE (log10f, "log10f is unportable - "
-                 "use gnulib module log10f for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef log10
-#   define log10 rpl_log10
-#  endif
-_GL_FUNCDECL_RPL (log10, double, (double x));
-_GL_CXXALIAS_RPL (log10, double, (double x));
-# else
-_GL_CXXALIAS_SYS (log10, double, (double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN1 (log10, double, (double x));
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef log10
-# if HAVE_RAW_DECL_LOG10
-_GL_WARN_ON_USE (log10, "log10 has portability problems - "
-                 "use gnulib module log10 for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef log10l
-#   define log10l rpl_log10l
-#  endif
-_GL_FUNCDECL_RPL (log10l, long double, (long double x));
-_GL_CXXALIAS_RPL (log10l, long double, (long double x));
-# else
-#  if !1 || !1
-#   undef log10l
-_GL_FUNCDECL_SYS (log10l, long double, (long double x));
-#  endif
-_GL_CXXALIAS_SYS (log10l, long double, (long double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (log10l);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef log10l
-# if HAVE_RAW_DECL_LOG10L
-_GL_WARN_ON_USE (log10l, "log10l is unportable - "
-                 "use gnulib module log10l for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef log1pf
-#   define log1pf rpl_log1pf
-#  endif
-_GL_FUNCDECL_RPL (log1pf, float, (float x));
-_GL_CXXALIAS_RPL (log1pf, float, (float x));
-# else
-#  if !1
-_GL_FUNCDECL_SYS (log1pf, float, (float x));
-#  endif
-_GL_CXXALIAS_SYS (log1pf, float, (float x));
-# endif
-_GL_CXXALIASWARN (log1pf);
-#elif defined GNULIB_POSIXCHECK
-# undef log1pf
-# if HAVE_RAW_DECL_LOG1PF
-_GL_WARN_ON_USE (log1pf, "log1pf is unportable - "
-                 "use gnulib module log1pf for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef log1p
-#   define log1p rpl_log1p
-#  endif
-_GL_FUNCDECL_RPL (log1p, double, (double x));
-_GL_CXXALIAS_RPL (log1p, double, (double x));
-# else
-#  if !1
-_GL_FUNCDECL_SYS (log1p, double, (double x));
-#  endif
-_GL_CXXALIAS_SYS (log1p, double, (double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN1 (log1p, double, (double x));
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef log1p
-# if HAVE_RAW_DECL_LOG1P
-_GL_WARN_ON_USE (log1p, "log1p has portability problems - "
-                 "use gnulib module log1p for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef log1pl
-#   define log1pl rpl_log1pl
-#  endif
-_GL_FUNCDECL_RPL (log1pl, long double, (long double x));
-_GL_CXXALIAS_RPL (log1pl, long double, (long double x));
-# else
-#  if !1
-_GL_FUNCDECL_SYS (log1pl, long double, (long double x));
-#  endif
-_GL_CXXALIAS_SYS (log1pl, long double, (long double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (log1pl);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef log1pl
-# if HAVE_RAW_DECL_LOG1PL
-_GL_WARN_ON_USE (log1pl, "log1pl has portability problems - "
-                 "use gnulib module log1pl for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef log2f
-#   define log2f rpl_log2f
-#  endif
-_GL_FUNCDECL_RPL (log2f, float, (float x));
-_GL_CXXALIAS_RPL (log2f, float, (float x));
-# else
-#  if !1
-#   undef log2f
-_GL_FUNCDECL_SYS (log2f, float, (float x));
-#  endif
-_GL_CXXALIAS_SYS (log2f, float, (float x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (log2f);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef log2f
-# if HAVE_RAW_DECL_LOG2F
-_GL_WARN_ON_USE (log2f, "log2f is unportable - "
-                 "use gnulib module log2f for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef log2
-#   define log2 rpl_log2
-#  endif
-_GL_FUNCDECL_RPL (log2, double, (double x));
-_GL_CXXALIAS_RPL (log2, double, (double x));
-# else
-#  if !1
-#   undef log2
-_GL_FUNCDECL_SYS (log2, double, (double x));
-#  endif
-_GL_CXXALIAS_SYS (log2, double, (double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN1 (log2, double, (double x));
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef log2
-# if HAVE_RAW_DECL_LOG2
-_GL_WARN_ON_USE (log2, "log2 is unportable - "
-                 "use gnulib module log2 for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef log2l
-#   define log2l rpl_log2l
-#  endif
-_GL_FUNCDECL_RPL (log2l, long double, (long double x));
-_GL_CXXALIAS_RPL (log2l, long double, (long double x));
-# else
-#  if !1
-_GL_FUNCDECL_SYS (log2l, long double, (long double x));
-#  endif
-_GL_CXXALIAS_SYS (log2l, long double, (long double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (log2l);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef log2l
-# if HAVE_RAW_DECL_LOG2L
-_GL_WARN_ON_USE (log2l, "log2l is unportable - "
-                 "use gnulib module log2l for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef logbf
-#   define logbf rpl_logbf
-#  endif
-_GL_FUNCDECL_RPL (logbf, float, (float x));
-_GL_CXXALIAS_RPL (logbf, float, (float x));
-# else
-#  if !1
-_GL_FUNCDECL_SYS (logbf, float, (float x));
-#  endif
-_GL_CXXALIAS_SYS (logbf, float, (float x));
-# endif
-_GL_CXXALIASWARN (logbf);
-#elif defined GNULIB_POSIXCHECK
-# undef logbf
-# if HAVE_RAW_DECL_LOGBF
-_GL_WARN_ON_USE (logbf, "logbf is unportable - "
-                 "use gnulib module logbf for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef logb
-#   define logb rpl_logb
-#  endif
-_GL_FUNCDECL_RPL (logb, double, (double x));
-_GL_CXXALIAS_RPL (logb, double, (double x));
-# else
-#  if !1
-_GL_FUNCDECL_SYS (logb, double, (double x));
-#  endif
-_GL_CXXALIAS_SYS (logb, double, (double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN1 (logb, double, (double x));
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef logb
-# if HAVE_RAW_DECL_LOGB
-_GL_WARN_ON_USE (logb, "logb is unportable - "
-                 "use gnulib module logb for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef logbl
-#   define logbl rpl_logbl
-#  endif
-_GL_FUNCDECL_RPL (logbl, long double, (long double x));
-_GL_CXXALIAS_RPL (logbl, long double, (long double x));
-# else
-#  if !1
-_GL_FUNCDECL_SYS (logbl, long double, (long double x));
-#  endif
-_GL_CXXALIAS_SYS (logbl, long double, (long double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (logbl);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef logbl
-# if HAVE_RAW_DECL_LOGBL
-_GL_WARN_ON_USE (logbl, "logbl is unportable - "
-                 "use gnulib module logbl for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef modff
-#   define modff rpl_modff
-#  endif
-_GL_FUNCDECL_RPL (modff, float, (float x, float *iptr) _GL_ARG_NONNULL ((2)));
-_GL_CXXALIAS_RPL (modff, float, (float x, float *iptr));
-# else
-#  if !1
-#   undef modff
-_GL_FUNCDECL_SYS (modff, float, (float x, float *iptr) _GL_ARG_NONNULL ((2)));
-#  endif
-_GL_CXXALIAS_SYS (modff, float, (float x, float *iptr));
-# endif
-_GL_CXXALIASWARN (modff);
-#elif defined GNULIB_POSIXCHECK
-# undef modff
-# if HAVE_RAW_DECL_MODFF
-_GL_WARN_ON_USE (modff, "modff is unportable - "
-                 "use gnulib module modff for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef modf
-#   define modf rpl_modf
-#  endif
-_GL_FUNCDECL_RPL (modf, double, (double x, double *iptr) _GL_ARG_NONNULL 
((2)));
-_GL_CXXALIAS_RPL (modf, double, (double x, double *iptr));
-# else
-_GL_CXXALIAS_SYS (modf, double, (double x, double *iptr));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN1 (modf, double, (double x, double *iptr));
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef modf
-# if HAVE_RAW_DECL_MODF
-_GL_WARN_ON_USE (modf, "modf has portability problems - "
-                 "use gnulib module modf for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef modfl
-#   define modfl rpl_modfl
-#  endif
-_GL_FUNCDECL_RPL (modfl, long double, (long double x, long double *iptr)
-                                      _GL_ARG_NONNULL ((2)));
-_GL_CXXALIAS_RPL (modfl, long double, (long double x, long double *iptr));
-# else
-#  if !1
-#   undef modfl
-_GL_FUNCDECL_SYS (modfl, long double, (long double x, long double *iptr)
-                                      _GL_ARG_NONNULL ((2)));
-#  endif
-_GL_CXXALIAS_SYS (modfl, long double, (long double x, long double *iptr));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (modfl);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef modfl
-# if HAVE_RAW_DECL_MODFL
-_GL_WARN_ON_USE (modfl, "modfl is unportable - "
-                 "use gnulib module modfl for portability");
-# endif
-#endif
-
-
-#if 0
-# if !1
-#  undef powf
-_GL_FUNCDECL_SYS (powf, float, (float x, float y));
-# endif
-_GL_CXXALIAS_SYS (powf, float, (float x, float y));
-_GL_CXXALIASWARN (powf);
-#elif defined GNULIB_POSIXCHECK
-# undef powf
-# if HAVE_RAW_DECL_POWF
-_GL_WARN_ON_USE (powf, "powf is unportable - "
-                 "use gnulib module powf for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef remainderf
-#   define remainderf rpl_remainderf
-#  endif
-_GL_FUNCDECL_RPL (remainderf, float, (float x, float y));
-_GL_CXXALIAS_RPL (remainderf, float, (float x, float y));
-# else
-#  if !1
-_GL_FUNCDECL_SYS (remainderf, float, (float x, float y));
-#  endif
-_GL_CXXALIAS_SYS (remainderf, float, (float x, float y));
-# endif
-_GL_CXXALIASWARN (remainderf);
-#elif defined GNULIB_POSIXCHECK
-# undef remainderf
-# if HAVE_RAW_DECL_REMAINDERF
-_GL_WARN_ON_USE (remainderf, "remainderf is unportable - "
-                 "use gnulib module remainderf for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef remainder
-#   define remainder rpl_remainder
-#  endif
-_GL_FUNCDECL_RPL (remainder, double, (double x, double y));
-_GL_CXXALIAS_RPL (remainder, double, (double x, double y));
-# else
-#  if !1 || !1
-_GL_FUNCDECL_SYS (remainder, double, (double x, double y));
-#  endif
-_GL_CXXALIAS_SYS (remainder, double, (double x, double y));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN1 (remainder, double, (double x, double y));
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef remainder
-# if HAVE_RAW_DECL_REMAINDER
-_GL_WARN_ON_USE (remainder, "remainder is unportable - "
-                 "use gnulib module remainder for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef remainderl
-#   define remainderl rpl_remainderl
-#  endif
-_GL_FUNCDECL_RPL (remainderl, long double, (long double x, long double y));
-_GL_CXXALIAS_RPL (remainderl, long double, (long double x, long double y));
-# else
-#  if !1
-#   undef remainderl
-#   if !(defined __cplusplus && defined _AIX)
-_GL_FUNCDECL_SYS (remainderl, long double, (long double x, long double y));
-#   endif
-#  endif
-_GL_CXXALIAS_SYS (remainderl, long double, (long double x, long double y));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (remainderl);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef remainderl
-# if HAVE_RAW_DECL_REMAINDERL
-_GL_WARN_ON_USE (remainderl, "remainderl is unportable - "
-                 "use gnulib module remainderl for portability");
-# endif
-#endif
-
-
-#if 0
-# if !1
-_GL_FUNCDECL_SYS (rintf, float, (float x));
-# endif
-_GL_CXXALIAS_SYS (rintf, float, (float x));
-_GL_CXXALIASWARN (rintf);
-#elif defined GNULIB_POSIXCHECK
-# undef rintf
-# if HAVE_RAW_DECL_RINTF
-_GL_WARN_ON_USE (rintf, "rintf is unportable - "
-                 "use gnulib module rintf for portability");
-# endif
-#endif
-
-#if 0
-# if !1
-_GL_FUNCDECL_SYS (rint, double, (double x));
-# endif
-_GL_CXXALIAS_SYS (rint, double, (double x));
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN1 (rint, double, (double x));
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef rint
-# if HAVE_RAW_DECL_RINT
-_GL_WARN_ON_USE (rint, "rint is unportable - "
-                 "use gnulib module rint for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef rintl
-#   define rintl rpl_rintl
-#  endif
-_GL_FUNCDECL_RPL (rintl, long double, (long double x));
-_GL_CXXALIAS_RPL (rintl, long double, (long double x));
-# else
-#  if !1
-_GL_FUNCDECL_SYS (rintl, long double, (long double x));
-#  endif
-_GL_CXXALIAS_SYS (rintl, long double, (long double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (rintl);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef rintl
-# if HAVE_RAW_DECL_RINTL
-_GL_WARN_ON_USE (rintl, "rintl is unportable - "
-                 "use gnulib module rintl for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef roundf
-#   define roundf rpl_roundf
-#  endif
-_GL_FUNCDECL_RPL (roundf, float, (float x));
-_GL_CXXALIAS_RPL (roundf, float, (float x));
-# else
-#  if !1
-_GL_FUNCDECL_SYS (roundf, float, (float x));
-#  endif
-_GL_CXXALIAS_SYS (roundf, float, (float x));
-# endif
-_GL_CXXALIASWARN (roundf);
-#elif defined GNULIB_POSIXCHECK
-# undef roundf
-# if HAVE_RAW_DECL_ROUNDF
-_GL_WARN_ON_USE (roundf, "roundf is unportable - "
-                 "use gnulib module roundf for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef round
-#   define round rpl_round
-#  endif
-_GL_FUNCDECL_RPL (round, double, (double x));
-_GL_CXXALIAS_RPL (round, double, (double x));
-# else
-#  if !1
-_GL_FUNCDECL_SYS (round, double, (double x));
-#  endif
-_GL_CXXALIAS_SYS (round, double, (double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN1 (round, double, (double x));
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef round
-# if HAVE_RAW_DECL_ROUND
-_GL_WARN_ON_USE (round, "round is unportable - "
-                 "use gnulib module round for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef roundl
-#   define roundl rpl_roundl
-#  endif
-_GL_FUNCDECL_RPL (roundl, long double, (long double x));
-_GL_CXXALIAS_RPL (roundl, long double, (long double x));
-# else
-#  if !1
-#   undef roundl
-#   if !(defined __cplusplus && defined _AIX)
-_GL_FUNCDECL_SYS (roundl, long double, (long double x));
-#   endif
-#  endif
-_GL_CXXALIAS_SYS (roundl, long double, (long double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (roundl);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef roundl
-# if HAVE_RAW_DECL_ROUNDL
-_GL_WARN_ON_USE (roundl, "roundl is unportable - "
-                 "use gnulib module roundl for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef sinf
-#   define sinf rpl_sinf
-#  endif
-_GL_FUNCDECL_RPL (sinf, float, (float x));
-_GL_CXXALIAS_RPL (sinf, float, (float x));
-# else
-#  if !1
-#   undef sinf
-_GL_FUNCDECL_SYS (sinf, float, (float x));
-#  endif
-_GL_CXXALIAS_SYS (sinf, float, (float x));
-# endif
-_GL_CXXALIASWARN (sinf);
-#elif defined GNULIB_POSIXCHECK
-# undef sinf
-# if HAVE_RAW_DECL_SINF
-_GL_WARN_ON_USE (sinf, "sinf is unportable - "
-                 "use gnulib module sinf for portability");
-# endif
-#endif
-
-#if 0
-# if !1 || !1
-#  undef sinl
-_GL_FUNCDECL_SYS (sinl, long double, (long double x));
-# endif
-_GL_CXXALIAS_SYS (sinl, long double, (long double x));
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (sinl);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef sinl
-# if HAVE_RAW_DECL_SINL
-_GL_WARN_ON_USE (sinl, "sinl is unportable - "
-                 "use gnulib module sinl for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef sinhf
-#   define sinhf rpl_sinhf
-#  endif
-_GL_FUNCDECL_RPL (sinhf, float, (float x));
-_GL_CXXALIAS_RPL (sinhf, float, (float x));
-# else
-#  if !1
-#   undef sinhf
-_GL_FUNCDECL_SYS (sinhf, float, (float x));
-#  endif
-_GL_CXXALIAS_SYS (sinhf, float, (float x));
-# endif
-_GL_CXXALIASWARN (sinhf);
-#elif defined GNULIB_POSIXCHECK
-# undef sinhf
-# if HAVE_RAW_DECL_SINHF
-_GL_WARN_ON_USE (sinhf, "sinhf is unportable - "
-                 "use gnulib module sinhf for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef sqrtf
-#   define sqrtf rpl_sqrtf
-#  endif
-_GL_FUNCDECL_RPL (sqrtf, float, (float x));
-_GL_CXXALIAS_RPL (sqrtf, float, (float x));
-# else
-#  if !1
-#   undef sqrtf
-_GL_FUNCDECL_SYS (sqrtf, float, (float x));
-#  endif
-_GL_CXXALIAS_SYS (sqrtf, float, (float x));
-# endif
-_GL_CXXALIASWARN (sqrtf);
-#elif defined GNULIB_POSIXCHECK
-# undef sqrtf
-# if HAVE_RAW_DECL_SQRTF
-_GL_WARN_ON_USE (sqrtf, "sqrtf is unportable - "
-                 "use gnulib module sqrtf for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef sqrtl
-#   define sqrtl rpl_sqrtl
-#  endif
-_GL_FUNCDECL_RPL (sqrtl, long double, (long double x));
-_GL_CXXALIAS_RPL (sqrtl, long double, (long double x));
-# else
-#  if !1 || !1
-#   undef sqrtl
-_GL_FUNCDECL_SYS (sqrtl, long double, (long double x));
-#  endif
-_GL_CXXALIAS_SYS (sqrtl, long double, (long double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (sqrtl);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef sqrtl
-# if HAVE_RAW_DECL_SQRTL
-_GL_WARN_ON_USE (sqrtl, "sqrtl is unportable - "
-                 "use gnulib module sqrtl for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef tanf
-#   define tanf rpl_tanf
-#  endif
-_GL_FUNCDECL_RPL (tanf, float, (float x));
-_GL_CXXALIAS_RPL (tanf, float, (float x));
-# else
-#  if !1
-#   undef tanf
-_GL_FUNCDECL_SYS (tanf, float, (float x));
-#  endif
-_GL_CXXALIAS_SYS (tanf, float, (float x));
-# endif
-_GL_CXXALIASWARN (tanf);
-#elif defined GNULIB_POSIXCHECK
-# undef tanf
-# if HAVE_RAW_DECL_TANF
-_GL_WARN_ON_USE (tanf, "tanf is unportable - "
-                 "use gnulib module tanf for portability");
-# endif
-#endif
-
-#if 0
-# if !1 || !1
-#  undef tanl
-_GL_FUNCDECL_SYS (tanl, long double, (long double x));
-# endif
-_GL_CXXALIAS_SYS (tanl, long double, (long double x));
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (tanl);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef tanl
-# if HAVE_RAW_DECL_TANL
-_GL_WARN_ON_USE (tanl, "tanl is unportable - "
-                 "use gnulib module tanl for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef tanhf
-#   define tanhf rpl_tanhf
-#  endif
-_GL_FUNCDECL_RPL (tanhf, float, (float x));
-_GL_CXXALIAS_RPL (tanhf, float, (float x));
-# else
-#  if !1
-#   undef tanhf
-_GL_FUNCDECL_SYS (tanhf, float, (float x));
-#  endif
-_GL_CXXALIAS_SYS (tanhf, float, (float x));
-# endif
-_GL_CXXALIASWARN (tanhf);
-#elif defined GNULIB_POSIXCHECK
-# undef tanhf
-# if HAVE_RAW_DECL_TANHF
-_GL_WARN_ON_USE (tanhf, "tanhf is unportable - "
-                 "use gnulib module tanhf for portability");
-# endif
-#endif
-
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef truncf
-#   define truncf rpl_truncf
-#  endif
-_GL_FUNCDECL_RPL (truncf, float, (float x));
-_GL_CXXALIAS_RPL (truncf, float, (float x));
-# else
-#  if !1
-_GL_FUNCDECL_SYS (truncf, float, (float x));
-#  endif
-_GL_CXXALIAS_SYS (truncf, float, (float x));
-# endif
-_GL_CXXALIASWARN (truncf);
-#elif defined GNULIB_POSIXCHECK
-# undef truncf
-# if HAVE_RAW_DECL_TRUNCF
-_GL_WARN_ON_USE (truncf, "truncf is unportable - "
-                 "use gnulib module truncf for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef trunc
-#   define trunc rpl_trunc
-#  endif
-_GL_FUNCDECL_RPL (trunc, double, (double x));
-_GL_CXXALIAS_RPL (trunc, double, (double x));
-# else
-#  if !1
-_GL_FUNCDECL_SYS (trunc, double, (double x));
-#  endif
-_GL_CXXALIAS_SYS (trunc, double, (double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN1 (trunc, double, (double x));
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef trunc
-# if HAVE_RAW_DECL_TRUNC
-_GL_WARN_ON_USE (trunc, "trunc is unportable - "
-                 "use gnulib module trunc for portability");
-# endif
-#endif
-
-#if 0
-# if 0
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef truncl
-#   define truncl rpl_truncl
-#  endif
-_GL_FUNCDECL_RPL (truncl, long double, (long double x));
-_GL_CXXALIAS_RPL (truncl, long double, (long double x));
-# else
-#  if !1
-_GL_FUNCDECL_SYS (truncl, long double, (long double x));
-#  endif
-_GL_CXXALIAS_SYS (truncl, long double, (long double x));
-# endif
-# if __GLIBC__ >= 2
-_GL_CXXALIASWARN (truncl);
-# endif
-#elif defined GNULIB_POSIXCHECK
-# undef truncl
-# if HAVE_RAW_DECL_TRUNCL
-_GL_WARN_ON_USE (truncl, "truncl is unportable - "
-                 "use gnulib module truncl for portability");
-# endif
-#endif
-
-
-#if 1
-/* On native Windows, map 'y0' to '_y0', so that -loldnames is not
-   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
-   platforms by defining GNULIB_NAMESPACE::y0 always.  */
-# if defined _WIN32 && !defined __CYGWIN__
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef y0
-#   define y0 _y0
-#  endif
-_GL_CXXALIAS_MDA (y0, double, (double x));
-# else
-_GL_CXXALIAS_SYS (y0, double, (double x));
-# endif
-_GL_CXXALIASWARN (y0);
-#endif
-
-#if 1
-/* On native Windows, map 'y1' to '_y1', so that -loldnames is not
-   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
-   platforms by defining GNULIB_NAMESPACE::y1 always.  */
-# if defined _WIN32 && !defined __CYGWIN__
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef y1
-#   define y1 _y1
-#  endif
-_GL_CXXALIAS_MDA (y1, double, (double x));
-# else
-_GL_CXXALIAS_SYS (y1, double, (double x));
-# endif
-_GL_CXXALIASWARN (y1);
-#endif
-
-#if 1
-/* On native Windows, map 'yn' to '_yn', so that -loldnames is not
-   required.  In C++ with GNULIB_NAMESPACE, avoid differences between
-   platforms by defining GNULIB_NAMESPACE::yn always.  */
-# if defined _WIN32 && !defined __CYGWIN__
-#  if !(defined __cplusplus && defined GNULIB_NAMESPACE)
-#   undef yn
-#   define yn _yn
-#  endif
-_GL_CXXALIAS_MDA (yn, double, (int n, double x));
-# else
-_GL_CXXALIAS_SYS (yn, double, (int n, double x));
-# endif
-_GL_CXXALIASWARN (yn);
-#endif
-
-
-/* Definitions of function-like macros come here, after the function
-   declarations.  */
-
-
-#if 0
-# if 0
-_GL_EXTERN_C int gl_isfinitef (float x);
-_GL_EXTERN_C int gl_isfinited (double x);
-_GL_EXTERN_C int gl_isfinitel (long double x);
-#  undef isfinite
-#  define isfinite(x) \
-   (sizeof (x) == sizeof (long double) ? gl_isfinitel (x) : \
-    sizeof (x) == sizeof (double) ? gl_isfinited (x) : \
-    gl_isfinitef (x))
-# endif
-# ifdef __cplusplus
-#  if defined isfinite || defined GNULIB_NAMESPACE
-_GL_MATH_CXX_REAL_FLOATING_DECL_1 (isfinite)
-#   undef isfinite
-#   if __GNUC__ >= 6 || (defined __clang__ && !((defined __APPLE__ && defined 
__MACH__) || defined __FreeBSD__ || defined __OpenBSD__ || defined _AIX || 
(defined _WIN32 && !defined __CYGWIN__)))
-  /* This platform's <cmath> possibly defines isfinite through a set of inline
-     functions.  */
-_GL_MATH_CXX_REAL_FLOATING_DECL_2 (isfinite, rpl_isfinite, bool)
-#    define isfinite rpl_isfinite
-#    define GNULIB_NAMESPACE_LACKS_ISFINITE 1
-#   else
-_GL_MATH_CXX_REAL_FLOATING_DECL_2 (isfinite, isfinite, bool)
-#   endif
-#  endif
-# endif
-#elif defined GNULIB_POSIXCHECK
-# if defined isfinite
-_GL_WARN_REAL_FLOATING_DECL (isfinite);
-#  undef isfinite
-#  define isfinite(x) _GL_WARN_REAL_FLOATING_IMPL (isfinite, x)
-# endif
-#endif
-
-
-#if 0
-# if 0
-_GL_EXTERN_C int gl_isinff (float x);
-_GL_EXTERN_C int gl_isinfd (double x);
-_GL_EXTERN_C int gl_isinfl (long double x);
-#  undef isinf
-#  define isinf(x) \
-   (sizeof (x) == sizeof (long double) ? gl_isinfl (x) : \
-    sizeof (x) == sizeof (double) ? gl_isinfd (x) : \
-    gl_isinff (x))
-# endif
-# ifdef __cplusplus
-#  if defined isinf || defined GNULIB_NAMESPACE
-_GL_MATH_CXX_REAL_FLOATING_DECL_1 (isinf)
-#   undef isinf
-#   if __GNUC__ >= 6 || (defined __clang__ && !((defined __APPLE__ && defined 
__MACH__) || defined __FreeBSD__ || defined __OpenBSD__ || (defined _WIN32 && 
!defined __CYGWIN__)))
-  /* This platform's <cmath> possibly defines isinf through a set of inline
-     functions.  */
-_GL_MATH_CXX_REAL_FLOATING_DECL_2 (isinf, rpl_isinf, bool)
-#    define isinf rpl_isinf
-#    define GNULIB_NAMESPACE_LACKS_ISINF 1
-#   else
-_GL_MATH_CXX_REAL_FLOATING_DECL_2 (isinf, isinf, bool)
-#   endif
-#  endif
-# endif
-#elif defined GNULIB_POSIXCHECK
-# if defined isinf
-_GL_WARN_REAL_FLOATING_DECL (isinf);
-#  undef isinf
-#  define isinf(x) _GL_WARN_REAL_FLOATING_IMPL (isinf, x)
-# endif
-#endif
-
-
-#if 0
-/* Test for NaN for 'float' numbers.  */
-# if 1
-/* The original <math.h> included above provides a declaration of isnan macro
-   or (older) isnanf function.  */
-#  if (__GNUC__ >= 4) || (__clang_major__ >= 4)
-    /* GCC >= 4.0 and clang provide a type-generic built-in for isnan.
-       GCC >= 4.0 also provides __builtin_isnanf, but clang doesn't.  */
-#   undef isnanf
-#   define isnanf(x) __builtin_isnan ((float)(x))
-#  elif defined isnan
-#   undef isnanf
-#   define isnanf(x) isnan ((float)(x))
-#  endif
-# else
-/* Test whether X is a NaN.  */
-#  undef isnanf
-#  define isnanf rpl_isnanf
-_GL_EXTERN_C int isnanf (float x);
-# endif
-#endif
-
-#if 0
-/* Test for NaN for 'double' numbers.
-   This function is a gnulib extension, unlike isnan() which applied only
-   to 'double' numbers earlier but now is a type-generic macro.  */
-# if 1
-/* The original <math.h> included above provides a declaration of isnan
-   macro.  */
-#  if (__GNUC__ >= 4) || (__clang_major__ >= 4)
-    /* GCC >= 4.0 and clang provide a type-generic built-in for isnan.  */
-#   undef isnand
-#   define isnand(x) __builtin_isnan ((double)(x))
-#  else
-#   undef isnand
-#   define isnand(x) isnan ((double)(x))
-#  endif
-# else
-/* Test whether X is a NaN.  */
-#  undef isnand
-#  define isnand rpl_isnand
-_GL_EXTERN_C int isnand (double x);
-# endif
-#endif
-
-#if 0
-/* Test for NaN for 'long double' numbers.  */
-# if 1
-/* The original <math.h> included above provides a declaration of isnan
-   macro or (older) isnanl function.  */
-#  if (__GNUC__ >= 4) || (__clang_major__ >= 4)
-    /* GCC >= 4.0 and clang provide a type-generic built-in for isnan.
-       GCC >= 4.0 also provides __builtin_isnanl, but clang doesn't.  */
-#   undef isnanl
-#   define isnanl(x) __builtin_isnan ((long double)(x))
-#  elif defined isnan
-#   undef isnanl
-#   define isnanl(x) isnan ((long double)(x))
-#  endif
-# else
-/* Test whether X is a NaN.  */
-#  undef isnanl
-#  define isnanl rpl_isnanl
-_GL_EXTERN_C int isnanl (long double x) _GL_ATTRIBUTE_CONST;
-# endif
-#endif
-
-/* This must come *after* the snippets for GNULIB_ISNANF and GNULIB_ISNANL!  */
-#if 0
-# if 0
-/* We can't just use the isnanf macro (e.g.) as exposed by
-   isnanf.h (e.g.) here, because those may end up being macros
-   that recursively expand back to isnan.  So use the gnulib
-   replacements for them directly. */
-#  if 1 && (__GNUC__ >= 4) || (__clang_major__ >= 4)
-#   define gl_isnan_f(x) __builtin_isnan ((float)(x))
-#  else
-_GL_EXTERN_C int rpl_isnanf (float x);
-#   define gl_isnan_f(x) rpl_isnanf (x)
-#  endif
-#  if 1 && (__GNUC__ >= 4) || (__clang_major__ >= 4)
-#   define gl_isnan_d(x) __builtin_isnan ((double)(x))
-#  else
-_GL_EXTERN_C int rpl_isnand (double x);
-#   define gl_isnan_d(x) rpl_isnand (x)
-#  endif
-#  if 1 && (__GNUC__ >= 4) || (__clang_major__ >= 4)
-#   define gl_isnan_l(x) __builtin_isnan ((long double)(x))
-#  else
-_GL_EXTERN_C int rpl_isnanl (long double x) _GL_ATTRIBUTE_CONST;
-#   define gl_isnan_l(x) rpl_isnanl (x)
-#  endif
-#  undef isnan
-#  define isnan(x) \
-   (sizeof (x) == sizeof (long double) ? gl_isnan_l (x) : \
-    sizeof (x) == sizeof (double) ? gl_isnan_d (x) : \
-    gl_isnan_f (x))
-# elif (__GNUC__ >= 4) || (__clang_major__ >= 4)
-#  undef isnan
-#  define isnan(x) \
-   (sizeof (x) == sizeof (long double) ? __builtin_isnan ((long double)(x)) : \
-    sizeof (x) == sizeof (double) ? __builtin_isnan ((double)(x)) : \
-    __builtin_isnan ((float)(x)))
-# endif
-# ifdef __cplusplus
-#  if defined isnan || defined GNULIB_NAMESPACE
-_GL_MATH_CXX_REAL_FLOATING_DECL_1 (isnan)
-#   undef isnan
-#   if __GNUC__ >= 6 || (defined __clang__ && !((defined __APPLE__ && defined 
__MACH__ && __clang_major__ < 12) || (defined __FreeBSD__ && (__clang_major__ < 
7 || __clang_major__ >= 11)) || defined __OpenBSD__ || (defined _WIN32 && 
!defined __CYGWIN__)))
-  /* This platform's <cmath> possibly defines isnan through a set of inline
-     functions.  */
-_GL_MATH_CXX_REAL_FLOATING_DECL_2 (isnan, rpl_isnan, bool)
-#    define isnan rpl_isnan
-#    define GNULIB_NAMESPACE_LACKS_ISNAN 1
-#   else
-_GL_MATH_CXX_REAL_FLOATING_DECL_2 (isnan, isnan, bool)
-#   endif
-#  endif
-# else
-/* Ensure isnan is a macro.  */
-#  ifndef isnan
-#   define isnan isnan
-#  endif
-# endif
-#elif defined GNULIB_POSIXCHECK
-# if defined isnan
-_GL_WARN_REAL_FLOATING_DECL (isnan);
-#  undef isnan
-#  define isnan(x) _GL_WARN_REAL_FLOATING_IMPL (isnan, x)
-# endif
-#endif
-
-
-#if 1
-# if (1 \
-      && (!defined __cplusplus || __cplusplus < 201103))
-#  undef signbit
-   /* GCC >= 4.0 and clang provide three built-ins for signbit.  */
-#  define signbit(x) \
-   (sizeof (x) == sizeof (long double) ? __builtin_signbitl (x) : \
-    sizeof (x) == sizeof (double) ? __builtin_signbit (x) : \
-    __builtin_signbitf (x))
-# endif
-# if 0 && !GNULIB_defined_signbit
-#  undef signbit
-_GL_EXTERN_C int gl_signbitf (float arg);
-_GL_EXTERN_C int gl_signbitd (double arg);
-_GL_EXTERN_C int gl_signbitl (long double arg);
-#  if (__GNUC__ >= 2 || defined __clang__) && !defined __STRICT_ANSI__
-#   define _GL_NUM_UINT_WORDS(type) \
-      ((sizeof (type) + sizeof (unsigned int) - 1) / sizeof (unsigned int))
-#   if defined FLT_SIGNBIT_WORD && defined FLT_SIGNBIT_BIT && !defined 
gl_signbitf
-#    define gl_signbitf_OPTIMIZED_MACRO
-#    define gl_signbitf(arg) \
-       ({ union { float _value;                                         \
-                  unsigned int _word[_GL_NUM_UINT_WORDS (float)];       \
-                } _m;                                                   \
-          _m._value = (arg);                                            \
-          (_m._word[FLT_SIGNBIT_WORD] >> FLT_SIGNBIT_BIT) & 1;          \
-        })
-#   endif
-#   if defined DBL_SIGNBIT_WORD && defined DBL_SIGNBIT_BIT && !defined 
gl_signbitd
-#    define gl_signbitd_OPTIMIZED_MACRO
-#    define gl_signbitd(arg) \
-       ({ union { double _value;                                        \
-                  unsigned int _word[_GL_NUM_UINT_WORDS (double)];      \
-                } _m;                                                   \
-          _m._value = (arg);                                            \
-          (_m._word[DBL_SIGNBIT_WORD] >> DBL_SIGNBIT_BIT) & 1;          \
-        })
-#   endif
-#   if defined LDBL_SIGNBIT_WORD && defined LDBL_SIGNBIT_BIT && !defined 
gl_signbitl
-#    define gl_signbitl_OPTIMIZED_MACRO
-#    define gl_signbitl(arg) \
-       ({ union { long double _value;                                   \
-                  unsigned int _word[_GL_NUM_UINT_WORDS (long double)]; \
-                } _m;                                                   \
-          _m._value = (arg);                                            \
-          (_m._word[LDBL_SIGNBIT_WORD] >> LDBL_SIGNBIT_BIT) & 1;        \
-        })
-#   endif
-#  endif
-#  define signbit(x) \
-   (sizeof (x) == sizeof (long double) ? gl_signbitl (x) : \
-    sizeof (x) == sizeof (double) ? gl_signbitd (x) : \
-    gl_signbitf (x))
-#  define GNULIB_defined_signbit 1
-# endif
-# ifdef __cplusplus
-#  if defined signbit || defined GNULIB_NAMESPACE
-_GL_MATH_CXX_REAL_FLOATING_DECL_1 (signbit)
-#   undef signbit
-#   if __GNUC__ >= 6 || (defined __clang__ && !((defined __APPLE__ && defined 
__MACH__) || defined __FreeBSD__ || defined __OpenBSD__ || defined _AIX || 
(defined _WIN32 && !defined __CYGWIN__)))
-  /* This platform's <cmath> possibly defines signbit through a set of inline
-     functions.  */
-_GL_MATH_CXX_REAL_FLOATING_DECL_2 (signbit, rpl_signbit, bool)
-#    define signbit rpl_signbit
-#    define GNULIB_NAMESPACE_LACKS_SIGNBIT 1
-#   else
-_GL_MATH_CXX_REAL_FLOATING_DECL_2 (signbit, signbit, bool)
-#   endif
-#  endif
-# endif
-#elif defined GNULIB_POSIXCHECK
-# if defined signbit
-_GL_WARN_REAL_FLOATING_DECL (signbit);
-#  undef signbit
-#  define signbit(x) _GL_WARN_REAL_FLOATING_IMPL (signbit, x)
-# endif
-#endif
-
-_GL_INLINE_HEADER_END
-
-#endif /* _GL_MATH_H */
-#endif /* _GL_INCLUDING_MATH_H */
-#endif /* _GL_MATH_H */
-#endif
diff --git a/lib/stdalign.in.h b/lib/stdalign.in.h
index 6523546f16d..b616c100fdc 100644
--- a/lib/stdalign.in.h
+++ b/lib/stdalign.in.h
@@ -20,8 +20,22 @@
 /* Define two obsolescent C11 macros, assuming alignas and alignof are
    either keywords or alignasof-defined macros.  */
 
-#ifndef _GL_STDALIGN_H
-#define _GL_STDALIGN_H
+#ifndef _@GUARD_PREFIX@_STDALIGN_H
+
+#if __GNUC__ >= 3
+@PRAGMA_SYSTEM_HEADER@
+#endif
+@PRAGMA_COLUMNS@
+
+/* We need to include the system's <stdalign.h> when it exists, because it 
might
+   define 'alignof' as a macro when it's not a keyword or compiler built-in.  
*/
+#if @HAVE_STDALIGN_H@
+/* The include_next requires a split double-inclusion guard.  */
+# @INCLUDE_NEXT@ @NEXT_STDALIGN_H@
+#endif
+
+#ifndef _@GUARD_PREFIX@_STDALIGN_H
+#define _@GUARD_PREFIX@_STDALIGN_H
 
 #if (defined alignas \
      || (defined __STDC_VERSION__ && 202311 <= __STDC_VERSION__) \
@@ -31,4 +45,5 @@
 
 #define __alignof_is_defined 1
 
-#endif /* _GL_STDALIGN_H */
+#endif /* _@GUARD_PREFIX@_STDALIGN_H */
+#endif /* _@GUARD_PREFIX@_STDALIGN_H */
diff --git a/lib/vasnprintf.c b/lib/vasnprintf.c
index ab11ad026ed..277c39e3e07 100644
--- a/lib/vasnprintf.c
+++ b/lib/vasnprintf.c
@@ -83,6 +83,7 @@
 #include <stdio.h>      /* snprintf(), sprintf() */
 #include <stdlib.h>     /* abort(), malloc(), realloc(), free() */
 #include <string.h>     /* memcpy(), strlen() */
+#include <wchar.h>      /* mbstate_t, mbrtowc(), mbrlen(), wcrtomb() */
 #include <errno.h>      /* errno */
 #include <limits.h>     /* CHAR_BIT */
 #include <float.h>      /* DBL_MAX_EXP, LDBL_MAX_EXP */
diff --git a/m4/gnulib-common.m4 b/m4/gnulib-common.m4
index d5b2f7c4e50..0f1a6ac1ead 100644
--- a/m4/gnulib-common.m4
+++ b/m4/gnulib-common.m4
@@ -1,4 +1,4 @@
-# gnulib-common.m4 serial 77
+# gnulib-common.m4 serial 78
 dnl Copyright (C) 2007-2023 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -124,29 +124,35 @@ AC_DEFUN([gl_COMMON_BODY], [
    by the Nth argument of the function is the size of the returned memory 
block.
  */
 /* Applies to: function, pointer to function, function types.  */
-#if _GL_HAS_ATTRIBUTE (alloc_size)
-# define _GL_ATTRIBUTE_ALLOC_SIZE(args) __attribute__ ((__alloc_size__ args))
-#else
-# define _GL_ATTRIBUTE_ALLOC_SIZE(args)
+#ifndef _GL_ATTRIBUTE_ALLOC_SIZE
+# if _GL_HAS_ATTRIBUTE (alloc_size)
+#  define _GL_ATTRIBUTE_ALLOC_SIZE(args) __attribute__ ((__alloc_size__ args))
+# else
+#  define _GL_ATTRIBUTE_ALLOC_SIZE(args)
+# endif
 #endif
 
 /* _GL_ATTRIBUTE_ALWAYS_INLINE tells that the compiler should always inline the
    function and report an error if it cannot do so.  */
 /* Applies to: function.  */
-#if _GL_HAS_ATTRIBUTE (always_inline)
-# define _GL_ATTRIBUTE_ALWAYS_INLINE __attribute__ ((__always_inline__))
-#else
-# define _GL_ATTRIBUTE_ALWAYS_INLINE
+#ifndef _GL_ATTRIBUTE_ALWAYS_INLINE
+# if _GL_HAS_ATTRIBUTE (always_inline)
+#  define _GL_ATTRIBUTE_ALWAYS_INLINE __attribute__ ((__always_inline__))
+# else
+#  define _GL_ATTRIBUTE_ALWAYS_INLINE
+# endif
 #endif
 
 /* _GL_ATTRIBUTE_ARTIFICIAL declares that the function is not important to show
     in stack traces when debugging.  The compiler should omit the function from
     stack traces.  */
 /* Applies to: function.  */
-#if _GL_HAS_ATTRIBUTE (artificial)
-# define _GL_ATTRIBUTE_ARTIFICIAL __attribute__ ((__artificial__))
-#else
-# define _GL_ATTRIBUTE_ARTIFICIAL
+#ifndef _GL_ATTRIBUTE_ARTIFICIAL
+# if _GL_HAS_ATTRIBUTE (artificial)
+#  define _GL_ATTRIBUTE_ARTIFICIAL __attribute__ ((__artificial__))
+# else
+#  define _GL_ATTRIBUTE_ARTIFICIAL
+# endif
 #endif
 
 /* _GL_ATTRIBUTE_COLD declares that the function is rarely executed.  */
@@ -154,14 +160,16 @@ AC_DEFUN([gl_COMMON_BODY], [
 /* Avoid __attribute__ ((cold)) on MinGW; see thread starting at
    <https://lists.gnu.org/r/emacs-devel/2019-04/msg01152.html>.
    Also, Oracle Studio 12.6 requires 'cold' not '__cold__'.  */
-#if _GL_HAS_ATTRIBUTE (cold) && !defined __MINGW32__
-# ifndef __SUNPRO_C
-#  define _GL_ATTRIBUTE_COLD __attribute__ ((__cold__))
+#ifndef _GL_ATTRIBUTE_COLD
+# if _GL_HAS_ATTRIBUTE (cold) && !defined __MINGW32__
+#  ifndef __SUNPRO_C
+#   define _GL_ATTRIBUTE_COLD __attribute__ ((__cold__))
+#  else
+#   define _GL_ATTRIBUTE_COLD __attribute__ ((cold))
+#  endif
 # else
-#  define _GL_ATTRIBUTE_COLD __attribute__ ((cold))
+#  define _GL_ATTRIBUTE_COLD
 # endif
-#else
-# define _GL_ATTRIBUTE_COLD
 #endif
 
 /* _GL_ATTRIBUTE_CONST declares that it is OK for a compiler to omit duplicate
@@ -171,10 +179,12 @@ AC_DEFUN([gl_COMMON_BODY], [
    forever, and does not call longjmp.
    (This attribute is stricter than _GL_ATTRIBUTE_PURE.)  */
 /* Applies to: functions.  */
-#if _GL_HAS_ATTRIBUTE (const)
-# define _GL_ATTRIBUTE_CONST __attribute__ ((__const__))
-#else
-# define _GL_ATTRIBUTE_CONST
+#ifndef _GL_ATTRIBUTE_CONST
+# if _GL_HAS_ATTRIBUTE (const)
+#  define _GL_ATTRIBUTE_CONST __attribute__ ((__const__))
+# else
+#  define _GL_ATTRIBUTE_CONST
+# endif
 #endif
 
 /* _GL_ATTRIBUTE_DEALLOC (F, I) declares that the function returns pointers
@@ -183,10 +193,12 @@ AC_DEFUN([gl_COMMON_BODY], [
    _GL_ATTRIBUTE_DEALLOC_FREE declares that the function returns pointers that
    can be freed via 'free'; it can be used only after declaring 'free'.  */
 /* Applies to: functions.  Cannot be used on inline functions.  */
-#if _GL_GNUC_PREREQ (11, 0)
-# define _GL_ATTRIBUTE_DEALLOC(f, i) __attribute__ ((__malloc__ (f, i)))
-#else
-# define _GL_ATTRIBUTE_DEALLOC(f, i)
+#ifndef _GL_ATTRIBUTE_DEALLOC
+# if _GL_GNUC_PREREQ (11, 0)
+#  define _GL_ATTRIBUTE_DEALLOC(f, i) __attribute__ ((__malloc__ (f, i)))
+# else
+#  define _GL_ATTRIBUTE_DEALLOC(f, i)
+# endif
 #endif
 /* If gnulib's <string.h> or <wchar.h> has already defined this macro, continue
    to use this earlier definition, since <stdlib.h> may not have been included
@@ -210,16 +222,18 @@ AC_DEFUN([gl_COMMON_BODY], [
      - enumeration, enumeration item,
      - typedef,
    in C++ also: namespace, class, template specialization.  */
-#ifdef __has_c_attribute
-# if __has_c_attribute (__deprecated__)
-#  define _GL_ATTRIBUTE_DEPRECATED [[__deprecated__]]
-# endif
-#endif
-#if !defined _GL_ATTRIBUTE_DEPRECATED && _GL_HAS_ATTRIBUTE (deprecated)
-# define _GL_ATTRIBUTE_DEPRECATED __attribute__ ((__deprecated__))
-#endif
 #ifndef _GL_ATTRIBUTE_DEPRECATED
-# define _GL_ATTRIBUTE_DEPRECATED
+# ifdef __has_c_attribute
+#  if __has_c_attribute (__deprecated__)
+#   define _GL_ATTRIBUTE_DEPRECATED [[__deprecated__]]
+#  endif
+# endif
+# if !defined _GL_ATTRIBUTE_DEPRECATED && _GL_HAS_ATTRIBUTE (deprecated)
+#  define _GL_ATTRIBUTE_DEPRECATED __attribute__ ((__deprecated__))
+# endif
+# ifndef _GL_ATTRIBUTE_DEPRECATED
+#  define _GL_ATTRIBUTE_DEPRECATED
+# endif
 #endif
 
 /* _GL_ATTRIBUTE_ERROR(msg) requests an error if a function is called and
@@ -227,24 +241,28 @@ AC_DEFUN([gl_COMMON_BODY], [
    _GL_ATTRIBUTE_WARNING(msg) requests a warning if a function is called and
    the function call is not optimized away.  */
 /* Applies to: functions.  */
-#if _GL_HAS_ATTRIBUTE (error)
-# define _GL_ATTRIBUTE_ERROR(msg) __attribute__ ((__error__ (msg)))
-# define _GL_ATTRIBUTE_WARNING(msg) __attribute__ ((__warning__ (msg)))
-#elif _GL_HAS_ATTRIBUTE (diagnose_if)
-# define _GL_ATTRIBUTE_ERROR(msg) __attribute__ ((__diagnose_if__ (1, msg, 
"error")))
-# define _GL_ATTRIBUTE_WARNING(msg) __attribute__ ((__diagnose_if__ (1, msg, 
"warning")))
-#else
-# define _GL_ATTRIBUTE_ERROR(msg)
-# define _GL_ATTRIBUTE_WARNING(msg)
+#if !(defined _GL_ATTRIBUTE_ERROR && defined _GL_ATTRIBUTE_WARNING)
+# if _GL_HAS_ATTRIBUTE (error)
+#  define _GL_ATTRIBUTE_ERROR(msg) __attribute__ ((__error__ (msg)))
+#  define _GL_ATTRIBUTE_WARNING(msg) __attribute__ ((__warning__ (msg)))
+# elif _GL_HAS_ATTRIBUTE (diagnose_if)
+#  define _GL_ATTRIBUTE_ERROR(msg) __attribute__ ((__diagnose_if__ (1, msg, 
"error")))
+#  define _GL_ATTRIBUTE_WARNING(msg) __attribute__ ((__diagnose_if__ (1, msg, 
"warning")))
+# else
+#  define _GL_ATTRIBUTE_ERROR(msg)
+#  define _GL_ATTRIBUTE_WARNING(msg)
+# endif
 #endif
 
 /* _GL_ATTRIBUTE_EXTERNALLY_VISIBLE declares that the entity should remain
    visible to debuggers etc., even with '-fwhole-program'.  */
 /* Applies to: functions, variables.  */
-#if _GL_HAS_ATTRIBUTE (externally_visible)
-# define _GL_ATTRIBUTE_EXTERNALLY_VISIBLE __attribute__ ((externally_visible))
-#else
-# define _GL_ATTRIBUTE_EXTERNALLY_VISIBLE
+#ifndef _GL_ATTRIBUTE_EXTERNALLY_VISIBLE
+# if _GL_HAS_ATTRIBUTE (externally_visible)
+#  define _GL_ATTRIBUTE_EXTERNALLY_VISIBLE __attribute__ ((externally_visible))
+# else
+#  define _GL_ATTRIBUTE_EXTERNALLY_VISIBLE
+# endif
 #endif
 
 /* _GL_ATTRIBUTE_FALLTHROUGH declares that it is not a programming mistake if
@@ -252,16 +270,18 @@ AC_DEFUN([gl_COMMON_BODY], [
    'default' label.  The compiler should not warn in this case.  */
 /* Applies to: Empty statement (;), inside a 'switch' statement.  */
 /* Always expands to something.  */
-#ifdef __has_c_attribute
-# if __has_c_attribute (__fallthrough__)
-#  define _GL_ATTRIBUTE_FALLTHROUGH [[__fallthrough__]]
-# endif
-#endif
-#if !defined _GL_ATTRIBUTE_FALLTHROUGH && _GL_HAS_ATTRIBUTE (fallthrough)
-# define _GL_ATTRIBUTE_FALLTHROUGH __attribute__ ((__fallthrough__))
-#endif
 #ifndef _GL_ATTRIBUTE_FALLTHROUGH
-# define _GL_ATTRIBUTE_FALLTHROUGH ((void) 0)
+# ifdef __has_c_attribute
+#  if __has_c_attribute (__fallthrough__)
+#   define _GL_ATTRIBUTE_FALLTHROUGH [[__fallthrough__]]
+#  endif
+# endif
+# if !defined _GL_ATTRIBUTE_FALLTHROUGH && _GL_HAS_ATTRIBUTE (fallthrough)
+#  define _GL_ATTRIBUTE_FALLTHROUGH __attribute__ ((__fallthrough__))
+# endif
+# ifndef _GL_ATTRIBUTE_FALLTHROUGH
+#  define _GL_ATTRIBUTE_FALLTHROUGH ((void) 0)
+# endif
 #endif
 
 /* _GL_ATTRIBUTE_FORMAT ((ARCHETYPE, STRING-INDEX, FIRST-TO-CHECK))
@@ -275,10 +295,12 @@ AC_DEFUN([gl_COMMON_BODY], [
    If FIRST-TO-CHECK is not 0, arguments starting at FIRST-TO_CHECK
    are suitable for the format string.  */
 /* Applies to: functions.  */
-#if _GL_HAS_ATTRIBUTE (format)
-# define _GL_ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
-#else
-# define _GL_ATTRIBUTE_FORMAT(spec)
+#ifndef _GL_ATTRIBUTE_FORMAT
+# if _GL_HAS_ATTRIBUTE (format)
+#  define _GL_ATTRIBUTE_FORMAT(spec) __attribute__ ((__format__ spec))
+# else
+#  define _GL_ATTRIBUTE_FORMAT(spec)
+# endif
 #endif
 
 /* _GL_ATTRIBUTE_LEAF declares that if the function is called from some other
@@ -286,19 +308,23 @@ AC_DEFUN([gl_COMMON_BODY], [
    exception handling.  This declaration lets the compiler optimize that unit
    more aggressively.  */
 /* Applies to: functions.  */
-#if _GL_HAS_ATTRIBUTE (leaf)
-# define _GL_ATTRIBUTE_LEAF __attribute__ ((__leaf__))
-#else
-# define _GL_ATTRIBUTE_LEAF
+#ifndef _GL_ATTRIBUTE_LEAF
+# if _GL_HAS_ATTRIBUTE (leaf)
+#  define _GL_ATTRIBUTE_LEAF __attribute__ ((__leaf__))
+# else
+#  define _GL_ATTRIBUTE_LEAF
+# endif
 #endif
 
 /* _GL_ATTRIBUTE_MALLOC declares that the function returns a pointer to freshly
    allocated memory.  */
 /* Applies to: functions.  */
-#if _GL_HAS_ATTRIBUTE (malloc)
-# define _GL_ATTRIBUTE_MALLOC __attribute__ ((__malloc__))
-#else
-# define _GL_ATTRIBUTE_MALLOC
+#ifndef _GL_ATTRIBUTE_MALLOC
+# if _GL_HAS_ATTRIBUTE (malloc)
+#  define _GL_ATTRIBUTE_MALLOC __attribute__ ((__malloc__))
+# else
+#  define _GL_ATTRIBUTE_MALLOC
+# endif
 #endif
 
 /* _GL_ATTRIBUTE_MAY_ALIAS declares that pointers to the type may point to the
@@ -306,10 +332,12 @@ AC_DEFUN([gl_COMMON_BODY], [
    strict aliasing optimization.  */
 /* Applies to: types.  */
 /* Oracle Studio 12.6 mishandles may_alias despite __has_attribute OK.  */
-#if _GL_HAS_ATTRIBUTE (may_alias) && !defined __SUNPRO_C
-# define _GL_ATTRIBUTE_MAY_ALIAS __attribute__ ((__may_alias__))
-#else
-# define _GL_ATTRIBUTE_MAY_ALIAS
+#ifndef _GL_ATTRIBUTE_MAY_ALIAS
+# if _GL_HAS_ATTRIBUTE (may_alias) && !defined __SUNPRO_C
+#  define _GL_ATTRIBUTE_MAY_ALIAS __attribute__ ((__may_alias__))
+# else
+#  define _GL_ATTRIBUTE_MAY_ALIAS
+# endif
 #endif
 
 /* _GL_ATTRIBUTE_MAYBE_UNUSED declares that it is not a programming mistake if
@@ -324,13 +352,15 @@ AC_DEFUN([gl_COMMON_BODY], [
 /* In C++ and C23, this is spelled [[__maybe_unused__]].
    GCC's syntax is __attribute__ ((__unused__)).
    clang supports both syntaxes.  */
-#ifdef __has_c_attribute
-# if __has_c_attribute (__maybe_unused__)
-#  define _GL_ATTRIBUTE_MAYBE_UNUSED [[__maybe_unused__]]
-# endif
-#endif
 #ifndef _GL_ATTRIBUTE_MAYBE_UNUSED
-# define _GL_ATTRIBUTE_MAYBE_UNUSED _GL_ATTRIBUTE_UNUSED
+# ifdef __has_c_attribute
+#  if __has_c_attribute (__maybe_unused__)
+#   define _GL_ATTRIBUTE_MAYBE_UNUSED [[__maybe_unused__]]
+#  endif
+# endif
+# ifndef _GL_ATTRIBUTE_MAYBE_UNUSED
+#  define _GL_ATTRIBUTE_MAYBE_UNUSED _GL_ATTRIBUTE_UNUSED
+# endif
 #endif
 /* Alternative spelling of this macro, for convenience and for
    compatibility with glibc/include/libc-symbols.h.  */
@@ -342,25 +372,29 @@ AC_DEFUN([gl_COMMON_BODY], [
    discard the return value.  The compiler may warn if the caller does not use
    the return value, unless the caller uses something like ignore_value.  */
 /* Applies to: function, enumeration, class.  */
-#ifdef __has_c_attribute
-# if __has_c_attribute (__nodiscard__)
-#  define _GL_ATTRIBUTE_NODISCARD [[__nodiscard__]]
-# endif
-#endif
-#if !defined _GL_ATTRIBUTE_NODISCARD && _GL_HAS_ATTRIBUTE (warn_unused_result)
-# define _GL_ATTRIBUTE_NODISCARD __attribute__ ((__warn_unused_result__))
-#endif
 #ifndef _GL_ATTRIBUTE_NODISCARD
-# define _GL_ATTRIBUTE_NODISCARD
+# ifdef __has_c_attribute
+#  if __has_c_attribute (__nodiscard__)
+#   define _GL_ATTRIBUTE_NODISCARD [[__nodiscard__]]
+#  endif
+# endif
+# if !defined _GL_ATTRIBUTE_NODISCARD && _GL_HAS_ATTRIBUTE (warn_unused_result)
+#  define _GL_ATTRIBUTE_NODISCARD __attribute__ ((__warn_unused_result__))
+# endif
+# ifndef _GL_ATTRIBUTE_NODISCARD
+#  define _GL_ATTRIBUTE_NODISCARD
+# endif
 #endif
 
 /* _GL_ATTRIBUTE_NOINLINE tells that the compiler should not inline the
    function.  */
 /* Applies to: functions.  */
-#if _GL_HAS_ATTRIBUTE (noinline)
-# define _GL_ATTRIBUTE_NOINLINE __attribute__ ((__noinline__))
-#else
-# define _GL_ATTRIBUTE_NOINLINE
+#ifndef _GL_ATTRIBUTE_NOINLINE
+# if _GL_HAS_ATTRIBUTE (noinline)
+#  define _GL_ATTRIBUTE_NOINLINE __attribute__ ((__noinline__))
+# else
+#  define _GL_ATTRIBUTE_NOINLINE
+# endif
 #endif
 
 /* _GL_ATTRIBUTE_NONNULL ((N1, N2,...)) declares that the arguments N1, N2,...
@@ -368,20 +402,24 @@ AC_DEFUN([gl_COMMON_BODY], [
    _GL_ATTRIBUTE_NONNULL () declares that all pointer arguments must not be
    null.  */
 /* Applies to: functions.  */
-#if _GL_HAS_ATTRIBUTE (nonnull)
-# define _GL_ATTRIBUTE_NONNULL(args) __attribute__ ((__nonnull__ args))
-#else
-# define _GL_ATTRIBUTE_NONNULL(args)
+#ifndef _GL_ATTRIBUTE_NONNULL
+# if _GL_HAS_ATTRIBUTE (nonnull)
+#  define _GL_ATTRIBUTE_NONNULL(args) __attribute__ ((__nonnull__ args))
+# else
+#  define _GL_ATTRIBUTE_NONNULL(args)
+# endif
 #endif
 
 /* _GL_ATTRIBUTE_NONSTRING declares that the contents of a character array is
    not meant to be NUL-terminated.  */
 /* Applies to: struct/union members and variables that are arrays of element
    type '[[un]signed] char'.  */
-#if _GL_HAS_ATTRIBUTE (nonstring)
-# define _GL_ATTRIBUTE_NONSTRING __attribute__ ((__nonstring__))
-#else
-# define _GL_ATTRIBUTE_NONSTRING
+#ifndef _GL_ATTRIBUTE_NONSTRING
+# if _GL_HAS_ATTRIBUTE (nonstring)
+#  define _GL_ATTRIBUTE_NONSTRING __attribute__ ((__nonstring__))
+# else
+#  define _GL_ATTRIBUTE_NONSTRING
+# endif
 #endif
 
 /* There is no _GL_ATTRIBUTE_NORETURN; use _Noreturn instead.  */
@@ -389,10 +427,12 @@ AC_DEFUN([gl_COMMON_BODY], [
 /* _GL_ATTRIBUTE_NOTHROW declares that the function does not throw exceptions.
  */
 /* Applies to: functions.  */
-#if _GL_HAS_ATTRIBUTE (nothrow) && !defined __cplusplus
-# define _GL_ATTRIBUTE_NOTHROW __attribute__ ((__nothrow__))
-#else
-# define _GL_ATTRIBUTE_NOTHROW
+#ifndef _GL_ATTRIBUTE_NOTHROW
+# if _GL_HAS_ATTRIBUTE (nothrow) && !defined __cplusplus
+#  define _GL_ATTRIBUTE_NOTHROW __attribute__ ((__nothrow__))
+# else
+#  define _GL_ATTRIBUTE_NOTHROW
+# endif
 #endif
 
 /* _GL_ATTRIBUTE_PACKED declares:
@@ -401,10 +441,12 @@ AC_DEFUN([gl_COMMON_BODY], [
    minimizing the memory required.  */
 /* Applies to: struct members, struct, union,
    in C++ also: class.  */
-#if _GL_HAS_ATTRIBUTE (packed)
-# define _GL_ATTRIBUTE_PACKED __attribute__ ((__packed__))
-#else
-# define _GL_ATTRIBUTE_PACKED
+#ifndef _GL_ATTRIBUTE_PACKED
+# if _GL_HAS_ATTRIBUTE (packed)
+#  define _GL_ATTRIBUTE_PACKED __attribute__ ((__packed__))
+# else
+#  define _GL_ATTRIBUTE_PACKED
+# endif
 #endif
 
 /* _GL_ATTRIBUTE_PURE declares that It is OK for a compiler to omit duplicate
@@ -414,19 +456,23 @@ AC_DEFUN([gl_COMMON_BODY], [
    observable state, and always returns exactly once.
    (This attribute is looser than _GL_ATTRIBUTE_CONST.)  */
 /* Applies to: functions.  */
-#if _GL_HAS_ATTRIBUTE (pure)
-# define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
-#else
-# define _GL_ATTRIBUTE_PURE
+#ifndef _GL_ATTRIBUTE_PURE
+# if _GL_HAS_ATTRIBUTE (pure)
+#  define _GL_ATTRIBUTE_PURE __attribute__ ((__pure__))
+# else
+#  define _GL_ATTRIBUTE_PURE
+# endif
 #endif
 
 /* _GL_ATTRIBUTE_RETURNS_NONNULL declares that the function's return value is
    a non-NULL pointer.  */
 /* Applies to: functions.  */
-#if _GL_HAS_ATTRIBUTE (returns_nonnull)
-# define _GL_ATTRIBUTE_RETURNS_NONNULL __attribute__ ((__returns_nonnull__))
-#else
-# define _GL_ATTRIBUTE_RETURNS_NONNULL
+#ifndef _GL_ATTRIBUTE_RETURNS_NONNULL
+# if _GL_HAS_ATTRIBUTE (returns_nonnull)
+#  define _GL_ATTRIBUTE_RETURNS_NONNULL __attribute__ ((__returns_nonnull__))
+# else
+#  define _GL_ATTRIBUTE_RETURNS_NONNULL
+# endif
 #endif
 
 /* _GL_ATTRIBUTE_SENTINEL(pos) declares that the variadic function expects a
@@ -434,17 +480,21 @@ AC_DEFUN([gl_COMMON_BODY], [
    _GL_ATTRIBUTE_SENTINEL () - The last argument is NULL (requires C99).
    _GL_ATTRIBUTE_SENTINEL ((N)) - The (N+1)st argument from the end is NULL.  
*/
 /* Applies to: functions.  */
-#if _GL_HAS_ATTRIBUTE (sentinel)
-# define _GL_ATTRIBUTE_SENTINEL(pos) __attribute__ ((__sentinel__ pos))
-#else
-# define _GL_ATTRIBUTE_SENTINEL(pos)
+#ifndef _GL_ATTRIBUTE_SENTINEL
+# if _GL_HAS_ATTRIBUTE (sentinel)
+#  define _GL_ATTRIBUTE_SENTINEL(pos) __attribute__ ((__sentinel__ pos))
+# else
+#  define _GL_ATTRIBUTE_SENTINEL(pos)
+# endif
 #endif
 
 /* A helper macro.  Don't use it directly.  */
-#if _GL_HAS_ATTRIBUTE (unused)
-# define _GL_ATTRIBUTE_UNUSED __attribute__ ((__unused__))
-#else
-# define _GL_ATTRIBUTE_UNUSED
+#ifndef _GL_ATTRIBUTE_UNUSED
+# if _GL_HAS_ATTRIBUTE (unused)
+#  define _GL_ATTRIBUTE_UNUSED __attribute__ ((__unused__))
+# else
+#  define _GL_ATTRIBUTE_UNUSED
+# endif
 #endif
 
 ]dnl There is no _GL_ATTRIBUTE_VISIBILITY; see m4/visibility.m4 instead.
@@ -455,10 +505,12 @@ AC_DEFUN([gl_COMMON_BODY], [
 /* Applies to: label (both in C and C++).  */
 /* Note that g++ < 4.5 does not support the '__attribute__ ((__unused__)) ;'
    syntax.  But clang does.  */
-#if !(defined __cplusplus && !_GL_GNUC_PREREQ (4, 5)) || defined __clang__
-# define _GL_UNUSED_LABEL _GL_ATTRIBUTE_UNUSED
-#else
-# define _GL_UNUSED_LABEL
+#ifndef _GL_UNUSED_LABEL
+# if !(defined __cplusplus && !_GL_GNUC_PREREQ (4, 5)) || defined __clang__
+#  define _GL_UNUSED_LABEL _GL_ATTRIBUTE_UNUSED
+# else
+#  define _GL_UNUSED_LABEL
+# endif
 #endif
 ])
   AH_VERBATIM([async_safe],
diff --git a/m4/stdalign.m4 b/m4/stdalign.m4
index 0bb9281f5ee..f49cf8ec162 100644
--- a/m4/stdalign.m4
+++ b/m4/stdalign.m4
@@ -71,7 +71,8 @@ AC_DEFUN([gl_ALIGNASOF],
 [#if !defined HAVE_C_ALIGNASOF && __cplusplus < 201103 && !defined alignof
 # if HAVE_STDALIGN_H
 #  include <stdalign.h>
-# else
+# endif
+
 /* ISO C23 alignas and alignof for platforms that lack it.
 
    References:
@@ -99,26 +100,32 @@ AC_DEFUN([gl_ALIGNASOF],
 /* GCC releases before GCC 4.9 had a bug in _Alignof.  See GCC bug 52023
    <https://gcc.gnu.org/bugzilla/show_bug.cgi?id=52023>.
    clang versions < 8.0.0 have the same bug.  */
-#   if (!defined __STDC_VERSION__ || __STDC_VERSION__ < 201112 \
-        || (defined __GNUC__ && __GNUC__ < 4 + (__GNUC_MINOR__ < 9) \
-            && !defined __clang__) \
-        || (defined __clang__ && __clang_major__ < 8))
-#    ifdef __cplusplus
-#     if (201103 <= __cplusplus || defined _MSC_VER)
-#      define _Alignof(type) alignof (type)
-#     else
-       template <class __t> struct __alignof_helper { char __a; __t __b; };
-#      define _Alignof(type) offsetof (__alignof_helper<type>, __b)
-#      define _GL_STDALIGN_NEEDS_STDDEF 1
-#     endif
+#  if (!defined __STDC_VERSION__ || __STDC_VERSION__ < 201112 \
+       || (defined __GNUC__ && __GNUC__ < 4 + (__GNUC_MINOR__ < 9) \
+           && !defined __clang__) \
+       || (defined __clang__ && __clang_major__ < 8))
+#   undef/**/_Alignof
+#   ifdef __cplusplus
+#    if (201103 <= __cplusplus || defined _MSC_VER)
+#     define _Alignof(type) alignof (type)
+#    else
+      template <class __t> struct __alignof_helper { char __a; __t __b; };
+#     define _Alignof(type) offsetof (__alignof_helper<type>, __b)
+#     define _GL_STDALIGN_NEEDS_STDDEF 1
+#    endif
+#   else
+#    if (defined __GNUC__ && 4 <= __GNUC__) || defined __clang__
+#     define _Alignof(type) __builtin_offsetof (struct { char __a; type __b; 
}, __b)
 #    else
 #     define _Alignof(type) offsetof (struct { char __a; type __b; }, __b)
 #     define _GL_STDALIGN_NEEDS_STDDEF 1
 #    endif
 #   endif
-#   if ! (defined __cplusplus && (201103 <= __cplusplus || defined _MSC_VER))
-#    define alignof _Alignof
-#   endif
+#  endif
+#  if ! (defined __cplusplus && (201103 <= __cplusplus || defined _MSC_VER))
+#   undef/**/alignof
+#   define alignof _Alignof
+#  endif
 
 /* alignas (A), also known as _Alignas (A), aligns a variable or type
    to the alignment A, where A is an integer constant expression.  For
@@ -144,6 +151,7 @@ AC_DEFUN([gl_ALIGNASOF],
      - alignas (TYPE) is equivalent to alignas (alignof (TYPE)).
 
    */
+# if !HAVE_STDALIGN_H
 #  if !defined __STDC_VERSION__ || __STDC_VERSION__ < 201112
 #   if defined __cplusplus && (201103 <= __cplusplus || defined _MSC_VER)
 #    define _Alignas(a) alignas (a)
@@ -165,9 +173,10 @@ AC_DEFUN([gl_ALIGNASOF],
        || (defined __STDC_VERSION__ && 201112 <= __STDC_VERSION__))
 #   define alignas _Alignas
 #  endif
-#  if _GL_STDALIGN_NEEDS_STDDEF
-#   include <stddef.h>
-#  endif
+# endif
+
+# if _GL_STDALIGN_NEEDS_STDDEF
+#  include <stddef.h>
 # endif
 #endif])
 ])
@@ -175,9 +184,17 @@ AC_DEFUN([gl_ALIGNASOF],
 AC_DEFUN([gl_STDALIGN_H],
 [
   AC_REQUIRE([gl_ALIGNASOF])
-  GL_GENERATE_STDALIGN_H=false
-  AS_IF([test "$gl_cv_header_working_stdalign_h" = no],
-    [GL_GENERATE_STDALIGN_H=true])
-
-  AC_CHECK_HEADERS_ONCE([stdalign.h])
+  if test "$gl_cv_header_working_stdalign_h" = no; then
+    GL_GENERATE_STDALIGN_H=true
+  else
+    GL_GENERATE_STDALIGN_H=false
+  fi
+
+  gl_CHECK_NEXT_HEADERS([stdalign.h])
+  if test $ac_cv_header_stdalign_h = yes; then
+    HAVE_STDALIGN_H=1
+  else
+    HAVE_STDALIGN_H=0
+  fi
+  AC_SUBST([HAVE_STDALIGN_H])
 ])
diff --git a/m4/stddef_h.m4 b/m4/stddef_h.m4
index c0553d6f2ff..a2322ebb7ee 100644
--- a/m4/stddef_h.m4
+++ b/m4/stddef_h.m4
@@ -1,4 +1,4 @@
-# stddef_h.m4 serial 12
+# stddef_h.m4 serial 13
 dnl Copyright (C) 2009-2023 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -22,7 +22,14 @@ AC_DEFUN_ONCE([gl_STDDEF_H],
     [gl_cv_type_max_align_t],
     [AC_COMPILE_IFELSE(
        [AC_LANG_PROGRAM(
-          [[#include <stddef.h>
+          [[/* On FreeBSD 12.0/x86, max_align_t defined by <stddef.h> has
+               the correct alignment with the default (wrong) definition of
+               _Alignof, but a wrong alignment as soon as we activate an
+               ISO C compliant _Alignof definition.  */
+            #if ((defined __GNUC__ && 4 <= __GNUC__) || defined __clang__) && 
!defined __cplusplus
+             #define _Alignof(type) __builtin_offsetof (struct { char __a; 
type __b; }, __b)
+            #endif
+            #include <stddef.h>
             unsigned int s = sizeof (max_align_t);
             #if defined __GNUC__ || defined __clang__ || defined 
__IBM__ALIGNOF__
             int check1[2 * (__alignof__ (double) <= __alignof__ (max_align_t)) 
- 1];



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